Seriously, you've built this much for 3D Sellers but you don't have an inventory location field? Wow. Just add a field for it under Inventory Quantity. If you have big plans to build multiple warehouses, then great, but a short-term fix would be even better.

Any update on this? It would be great to just enter a bin or shelf location for tracking purposes

Definitely need the ability to assign each inventory item to specific shelf/bin locations.

Does the location request asking for geographic location or can you allow the user to be more specific such as storage bin or unit ID?