To determine how the original Miscellaneous Cash Transaction was distributed, go into AR Manager and set your Transaction Filter so the MC transaction in question is displayed in the grid.  Once the transaction is displayed, double click on the transaction to display it in the MC Entry window.  Choose TOOLS, View Related GL Transactions to display the GL transaction created upon the initial saving of the transaction.  The GL distribution lines will display and you can view the account number used in the Details pane for each line.