Modern Retail receives one value for an integration ID (the Windward PartUnique). What locations are included in that information is defined by, and sent to Modern Retail, by Windward.
At this time, we do not receive a separate value for individual locations from Windward, only an aggregate.
If you have multiple locations in Windward, you will need to contact their team directly to help you define which locations are included in that aggregate inventory.
If you have any questions, please open a Support Ticket.