Forwarder Agent Determination in Outbound Delivery

Hi Experts

I’m trying to implement a Forwarder Agent Determination partner on my outbound delivery. The requirement is to copy the information that is on the route definition (field TDLNR) into the Partner SP(Forwarding Agent)

I already added the partner into my document and partner procedure. However the only way until know is adding the value manually.

Is there an standard way to bring it from the Route configuration?

Thanks