Credit Card ABA file

We have started using a new pay provider that allows me to use a credit card to pay suppliers - I can upload an ABA file to do this but am having trouble setting it up 

I can change the pay from account to a credit card but I get banking information is missing.

Credit cards don't have BSB and account numbers.

I tried putting in a fake BSB and account number but I got a Bank Files are not created from this account message.

I tried to make it a linked account but I already have an electronic payments account linked.

How do I add an additional account?