How do I get the exact pick location or source location in my delivery order or transfer?

I have hundreds of products and for each product shelf or location in the warehouse

Wh1 have Wh1 / stock than Wh1 / Stock / shelf1, Wh1 / Stock / shelf20 ... etc

For receiving goods I use Putaways Rules

Ex. Product A Receipt Wh1 / stock Putawaya rules to Wh1 / stock / Shelf20

But to Transfer or delivery it only shows “wh1 / stock” as source location for every product and not the exact location

Ex. On Delivery order sources location by default it is wh1 / stock

When we select Product A from default it is wh1 / stock it should select the product A location which is wh1 / stock / shelf20

What setting do I need to make to get an exact location of the product?