How to enter payment details when selecting "Marked as Paid" on a draft order

[CMH_Orders]

Hi Guys,

If I create a draft order and someone sends me a cheque or wire transfer and I click "mark as paid" on the draft order, how /where can I record the cheque number or the wire transfer confirmation number for that order so that I can reconcile the payment and the order later on in my ERP system?

Thanks,

Claire