Location Names field is empty for First Party Registration

we have just applied the Phase 2 patches

We are having difficulty with the First Party Registration Location Names configuration as location names is not showing any list of values even though we have multiple locations set up India- where is this populated from?

Trying to set up first party registrations based on inventory Organisation type but location names do not have any list values to choose from ... for your information we expect to be registered in all states but our current oracle EBS set up only has one Operating Unit and one Inventory Organisation. The idea is to setup the Inventory Organisation with State location combination for each registrations. i.e. one inventory org with multiple registrations when combined with locations. Any ideas where to set up multiple locations for a single inventory organisation and would this propose set up structure work?