Sending IDOCs to Non SAP system in Single Stack

Hi Experts,

We have a configuration in PI in which we are sending IDOCs to third party Non-SAP system.

It is achieved by configuring the program ID in RFC destination.

I would like to know how this can be achieved in single stack configuration in PI as the RFC destination created in NWA has no such option of setting the program ID.

Regards,

Shashank