Question on Cash Advance source

We are trying to implement Cash advance and beginning to define the cash advance source. There are 2 accounts from which currently cash advance generates payment for Employees. First account is for providing Cash advance for domestic travel advances and the second account is for international travel advances. The question now is- how do I define 2 Cash advance source pointing to two different account which needs payment generate from AP. In the standard accounting template I can link only one account to cash advance.

Any inputs and thoughts is really appreciated!

Thank you!