Shopping Cart number not displaying in Purchase Requisition

Hi SRM Gurus

We have a problem with shopping cart numbers displaying in SAP EBP (SRM/MEP) on the PO. There is a field in the header data of POs, on the 'Customer Data' tab, for the cart number. But the shopping cart numbers are not displaying in purchase requisition, because of this reason the PR converted to the PO don't have the shopping cart number in the Customer data tab.

Please advice.

your answer will be rewarded.

Thanks

Sada