POs with Account Assignment Category F

Hello ...

I have the following issue:

We create POs with Account Assignment Category F, we put the Internal Order, GL Account.

As you know, when post the 101 mvt, it is not assigned to a storage location.

My question is, how I can define that when do the 101 mvt the inventory is afected and material is assigned to a storage location?

Have you seen this kind of cases?