How to default ship to location from source purchasing document on planning workbench?

We have 2 inventory locations for 1 inventory organization. We have 50% parts received at Location1 and 50% parts received at Location2. We observed that while releasing the planned orders on PWB, always the location1 gets defaulted as it is attached to organization. ( Both locations are actually attached to same inventory organization).

Impact - When the planned orders are released for Item1 which is expected to receive at location1, PO release shows ship to location as Location1. However for Item1 which is expected to receive at Location1 when a planned order is released and gets converted to PO release, this release also shows ship to location as Location1.