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<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Thu Apr 03 19:58:29 UTC 2025 -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_AllOtherCompensation_lbl" xml:lang="en-US">All Other Compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_AllOtherCompensation" xlink:to="mbcn_AllOtherCompensation_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_AllOtherCompensation_lbl0" xml:lang="en-US">All other compensation for the period that could not be properly reported in any other column of the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_AllOtherCompensation" xlink:to="mbcn_AllOtherCompensation_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_Bonus" xlink:href="mbcn-20250404.xsd#mbcn_Bonus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_Bonus_lbl" xml:lang="en-US">Bonus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Bonus" xlink:to="mbcn_Bonus_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_Bonus_lbl0" xml:lang="en-US">The dollar value of bonus (cash and non-cash) earned by the named executive officer during the period as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Bonus" xlink:to="mbcn_Bonus_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwards" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwards"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwards_lbl" xml:lang="en-US">Equity Awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwards" xlink:to="mbcn_EquityAwards_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwards_lbl0" xml:lang="en-US">The aggregate grant date fair value computed in accordance with FASB ASC Topic 718 of all equity awards granted during the period as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwards" xlink:to="mbcn_EquityAwards_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_NonEquityIncentivePlanCompensation" xlink:href="mbcn-20250404.xsd#mbcn_NonEquityIncentivePlanCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_NonEquityIncentivePlanCompensation_lbl" xml:lang="en-US">Non-Equity Incentive Plan Compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NonEquityIncentivePlanCompensation" xlink:to="mbcn_NonEquityIncentivePlanCompensation_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_NonEquityIncentivePlanCompensation_lbl0" xml:lang="en-US">The dollar value of (1) all earnings for services performed during the period pursuant to awards under non-equity incentive plans and (2) all earnings on any outstanding awards under such plans as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NonEquityIncentivePlanCompensation" xlink:to="mbcn_NonEquityIncentivePlanCompensation_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_NonqualifiedDeferredCompensationEarnings" xlink:href="mbcn-20250404.xsd#mbcn_NonqualifiedDeferredCompensationEarnings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_NonqualifiedDeferredCompensationEarnings_lbl" xml:lang="en-US">Nonqualified Deferred Compensation Earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NonqualifiedDeferredCompensationEarnings" xlink:to="mbcn_NonqualifiedDeferredCompensationEarnings_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_NonqualifiedDeferredCompensationEarnings_lbl0" xml:lang="en-US">Above-market or preferential earnings on compensation that is deferred on a basis that is not tax-qualified, including any such earnings on nonqualified defined contribution plans, as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NonqualifiedDeferredCompensationEarnings" xlink:to="mbcn_NonqualifiedDeferredCompensationEarnings_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_OptionAwards" xlink:href="mbcn-20250404.xsd#mbcn_OptionAwards"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_OptionAwards_lbl" xml:lang="en-US">Option Awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_OptionAwards" xlink:to="mbcn_OptionAwards_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_OptionAwards_lbl0" xml:lang="en-US">The aggregate grant date fair value computed in accordance with FASB ASC Topic 718 for any awards of options, with or without tandem Stock Appreciation Rights (SARs), as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_OptionAwards" xlink:to="mbcn_OptionAwards_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_Pension" xlink:href="mbcn-20250404.xsd#mbcn_Pension"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_Pension_lbl" xml:lang="en-US">Pension</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Pension" xlink:to="mbcn_Pension_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_Pension_lbl0" xml:lang="en-US">The aggregate pension value, as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Pension" xlink:to="mbcn_Pension_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_Salary" xlink:href="mbcn-20250404.xsd#mbcn_Salary"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_Salary_lbl" xml:lang="en-US">Salary</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Salary" xlink:to="mbcn_Salary_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_Salary_lbl0" xml:lang="en-US">The dollar value of base salary (cash and non-cash) earned by the named executive officer during the period as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_Salary" xlink:to="mbcn_Salary_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_StockAwards" xlink:href="mbcn-20250404.xsd#mbcn_StockAwards"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_StockAwards_lbl" xml:lang="en-US">Stock Awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_StockAwards" xlink:to="mbcn_StockAwards_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_StockAwards_lbl0" xml:lang="en-US">The aggregate grant date fair value computed in accordance with FASB ASC Topic 718 of all stock awards granted during the period as reported in the Summary Compensation Table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_StockAwards" xlink:to="mbcn_StockAwards_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_ChangeInPensionValueAndEquityAwardValueMember" xlink:href="mbcn-20250404.xsd#mbcn_ChangeInPensionValueAndEquityAwardValueMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_ChangeInPensionValueAndEquityAwardValueMember_lbl" xml:lang="en-US">Change In Pension Value and Equity Award Value [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_ChangeInPensionValueAndEquityAwardValueMember" xlink:to="mbcn_ChangeInPensionValueAndEquityAwardValueMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_ChangeInPensionValueAndEquityAwardValueMember_lbl0" xml:lang="en-US">This member presents the total compensation adjustment for change in pension value and equity award value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_ChangeInPensionValueAndEquityAwardValueMember" xlink:to="mbcn_ChangeInPensionValueAndEquityAwardValueMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember_lbl" xml:lang="en-US">Adjustments For Equity Awards Failed To Meet Performance Conditions [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember" xlink:to="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on adjustments for equity awards that failed to meet performance conditions.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember" xlink:to="mbcn_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember_lbl" xml:lang="en-US">Change In Fair Value As Of Vesting Date Of Current Year Awards Vested During Current Year [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on the change in fair value (as of vesting date) of current  year awards vested during current year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember_lbl" xml:lang="en-US">Change In Fair Value As Of Vesting Date Of Prior Year Awards Vested During Current Year [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on the change in fair value (as of vesting date) of prior year awards vested during current year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember_lbl" xml:lang="en-US">Change In Fair Value As Of Vesting Date Of Awards Vested During Current Year [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on the change in fair value (as of vesting date) of awards vested during current year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember_lbl" xml:lang="en-US">Change In Fair Value Of Outstanding And Unvested Awards Granted In Prior Fiscal Years [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on the change in fair value from the end of the prior fiscal year of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember" xlink:to="mbcn_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember_lbl" xml:lang="en-US">Dividends Or Other Earnings Paid On Equity Awards Not Otherwise Reflected In Fair Value [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember" xlink:to="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on dividends or other earnings paid on equity awards not otherwise reflected in fair value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember" xlink:to="mbcn_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsMember_lbl" xml:lang="en-US">Total Equity Awards Adjustments [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsMember" xlink:to="mbcn_EquityAwardsAdjustmentsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsMember_lbl0" xml:lang="en-US">This member presents the total equity awards adjustments, which may be comprised of adjustments for (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; (ii) the change in fair value from the end of the prior fiscal year of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; (iii) for awards granted in prior years that vest in the applicable year, the amount equal to the change in value as of the vesting date (from the end of the prior fiscal year); (iv) adjustments for equity awards that failed to meet performance conditions; and (v) dividends or other earnings paid on equity awards not otherwise reflected in fair value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsMember" xlink:to="mbcn_EquityAwardsAdjustmentsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember_lbl" xml:lang="en-US">Year-end Fair Value Of Awards Granted In The Current Fiscal Year [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember_lbl0" xml:lang="en-US">This member presents the equity awards adjustments on the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember" xlink:to="mbcn_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:href="mbcn-20250404.xsd#mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl" xml:lang="en-US">Equity Awards Value In Summary Compensation Table (Grant Date Value) [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl0" xml:lang="en-US">This member presents the adjustment (deduction) for equity awards value from summary compensation table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_EquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_FirstPEOMember" xlink:href="mbcn-20250404.xsd#mbcn_FirstPEOMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_FirstPEOMember_lbl" xml:lang="en-US">First PEO [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_FirstPEOMember" xlink:to="mbcn_FirstPEOMember_lbl"/>
    <loc xlink:type="locator" xlink:label="mbcn_NetAdjustmentsForEquityAwardsMember" xlink:href="mbcn-20250404.xsd#mbcn_NetAdjustmentsForEquityAwardsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_NetAdjustmentsForEquityAwardsMember_lbl" xml:lang="en-US">Total Net Adjustments For Equity Awards [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NetAdjustmentsForEquityAwardsMember" xlink:to="mbcn_NetAdjustmentsForEquityAwardsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_NetAdjustmentsForEquityAwardsMember_lbl0" xml:lang="en-US">This member presents the net compensation adjustment for equity awards, which is comprised of equity awards value from summary compensation table, net of total equity awards adjustments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NetAdjustmentsForEquityAwardsMember" xlink:to="mbcn_NetAdjustmentsForEquityAwardsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_NetAdjustmentsForPensionMember" xlink:href="mbcn-20250404.xsd#mbcn_NetAdjustmentsForPensionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_NetAdjustmentsForPensionMember_lbl" xml:lang="en-US">Total Net Adjustments For Pension [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NetAdjustmentsForPensionMember" xlink:to="mbcn_NetAdjustmentsForPensionMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_NetAdjustmentsForPensionMember_lbl0" xml:lang="en-US">This member presents the net compensation adjustment for pension, which is comprised of pension value from summary compensation table, net of total pension adjustments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_NetAdjustmentsForPensionMember" xlink:to="mbcn_NetAdjustmentsForPensionMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_PensionAdjustmentsMember" xlink:href="mbcn-20250404.xsd#mbcn_PensionAdjustmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_PensionAdjustmentsMember_lbl" xml:lang="en-US">Total Pension Adjustments [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsMember" xlink:to="mbcn_PensionAdjustmentsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_PensionAdjustmentsMember_lbl0" xml:lang="en-US">This member presents the total pension adjustments, which may be comprised of adjustments for service cost and prior service cost.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsMember" xlink:to="mbcn_PensionAdjustmentsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_PensionAdjustmentsPriorServiceCostMember" xlink:href="mbcn-20250404.xsd#mbcn_PensionAdjustmentsPriorServiceCostMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl" xml:lang="en-US">Pension Adjustments Prior Service Cost [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsPriorServiceCostMember" xlink:to="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl0" xml:lang="en-US">This member presents the total pension adjustments, prior service cost.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsPriorServiceCostMember" xlink:to="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_PensionAdjustmentsServiceCostMember" xlink:href="mbcn-20250404.xsd#mbcn_PensionAdjustmentsServiceCostMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="mbcn_PensionAdjustmentsServiceCostMember_lbl" xml:lang="en-US">Pension Adjustments Service Cost [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsServiceCostMember" xlink:to="mbcn_PensionAdjustmentsServiceCostMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_PensionAdjustmentsServiceCostMember_lbl0" xml:lang="en-US">This member presents the pension adjustments, service cost.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsServiceCostMember" xlink:to="mbcn_PensionAdjustmentsServiceCostMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:href="mbcn-20250404.xsd#mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl" xml:lang="en-US">Pension Value And Equity Awards Value In Compensation Table For The Applicable Year [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl0" xml:lang="en-US">This member presents the total compensation adjustment for pension value and equity awards value in compensation table for the applicable year.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_PensionValueAndEquityAwardsValueInCompensationTableForTheApplicableYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_PensionValueInCompensationTableForTheApplicableYearMember" xlink:href="mbcn-20250404.xsd#mbcn_PensionValueInCompensationTableForTheApplicableYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_PensionValueInCompensationTableForTheApplicableYearMember_lbl" xml:lang="en-US">Pension Adjustments Pension Value In Summary Compensation Table [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_PensionValueInCompensationTableForTheApplicableYearMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="mbcn_PensionValueInCompensationTableForTheApplicableYearMember_lbl0" xml:lang="en-US">This member presents the adjustment (deduction) for pension value from summary compensation table.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionValueInCompensationTableForTheApplicableYearMember" xlink:to="mbcn_PensionValueInCompensationTableForTheApplicableYearMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="mbcn_SecondPEOMember" xlink:href="mbcn-20250404.xsd#mbcn_SecondPEOMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_SecondPEOMember_lbl" xml:lang="en-US">Second PEO [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_SecondPEOMember" xlink:to="mbcn_SecondPEOMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl1" xml:lang="en-US">Pension Adjustments Prior Service Cost Member</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsPriorServiceCostMember" xlink:to="mbcn_PensionAdjustmentsPriorServiceCostMember_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="mbcn_PensionAdjustmentsServiceCostMember_lbl1" xml:lang="en-US">Pension Adjustments Service Cost Member</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="mbcn_PensionAdjustmentsServiceCostMember" xlink:to="mbcn_PensionAdjustmentsServiceCostMember_lbl1"/>
  </labelLink>
</linkbase>
