Budget Approver for Purchase Requisition

Hi,

In MM setup for purchase requisition, 4 levels has been setup for approving based on amount. The person who will approve is configured to be determined based on user exit (value - 9) in TCode OMGQ.

My question here is where is this user exit and how can we know to whom this PR will actually reach for approval.

Please help me out.

Regards,

Binay Agarwal