Warehouse Column in PO Suggestion Entry

Hello Everyone,
Where do the warehouse columns in the PO Suggestion Entry come from?
This probably brings up the Primary Warehouse column in Part Maintenance. Is that right?
But i would like to see a warehouse that actually needs to be stocked in this or another column. We create a PO Suggestion with the Job’s Materials. So, I want that Job’s warehouse to appear in this column.
How can I set it up like that?
Any help would be appreciated.