To map database field to BAPI parameters : SE11 look for data-elemtn MCHA-FVDT2 is FVDAT, now SE37, BATCHATTRIBUTES / BAPIBATCHATT-FREE_DATE1 (and 2, 3, etc) shares same data element, also set BATCHATTRIBUTESX / BAPIBATCHATTX-FREE_DATE1 to 'X'.
Hint: SAP also use some MAP2I*/MAP2E* (When none exists, you can generate you own with transaction BDBS) to map those data (here look at MAP2E_MCHA_TO_BAPIBATCHATT)
Regards,
Raymond