Hi Vince,
Do you want to receive Idocs in PI or send them to ECC? In the first case you should look at inboundRA and JCo provider, then the Program ID is configured per PI system. In the second case you need only RFC destination in NWA. I completed this configuration for both inbound and outbound several times and I never had to do anything about outboundRA.
Regards,
Radek