I'm using with context like :

q = product.with_context({'location':location_id}).qty_available.

It updated the destination location BUT I want also the source location to be updated so if i want MAIN to adjustment, it will return the qty_available based on that location,

In the code above, it return the qty_available with destination of location_id which is the adjustment but the source is from all the location not just the main (other location: branch1,branch2,etc....),

How can I use the context further?So that it will return only the qty_available based on the location (Main(Source)->Adjustment(Dest))