How Storage Location = LGORT is populated in reservation process order table RESB ?

Hello Gurus !

Can you help me, in process order (table RESB) I can see storage location 0001(Main WM) for a material, but in MM03 view MRP2 and Work scheduling I have storage Loc '0005'....

My stock is in storage Loc. 0005 !, so where is this information (LGORT) coming from ?

Of course I got missing part when I release my process order.

How can I get 0005 as Storage Loc. in my process order ?

Thank you for your help

Regards

Philippe