Local Contracts as Source of Supply.

Dear Experts,

We are on SRM 7.0 and Iu2019m not been able to add local contract (based on product id) to the supplier list since the contract number field is activated only once backend system is selected. Hence please let me know if there are any workarounds on the way to make local contracts as source of supply.

Thanks and Regards,

Venkata Koppisetti.