Change Delivery Address In PO

Hi Experts,

I want to change the delivery address in PO for a particular Account Assignment Category. When the category is 'Z', I want to fetch the sales order ship to party address which is mentioned in Account assignment tab by clicking more button. I have found the enhancement MMDA0001 - Default delivery address where i can pass the adrnr . But i am not getting the account assignment tab values in the debugger.

Its urgent.

Awaiting your responses.

Thanks & Regards

Akshay J