Reconciled check box from BankAccountTrans to CustTrans


I am trying to bring “Reconciled” check box display method from “BankAccounttrans” to “CustTrans” but i can not see any identifier between these two lines other than “Voucher”. i can not use “Voucher” since the PDC posting will have different voucher number for “CustTrans” and “BankAccountTrans”. i tried to join the “LedgerJounrlTrans” and “CustVendPDCRegister” but still i couldn’t see any common factor to connect both. Please advice.