SAP PI7.3 ABAP Proxy to PI

Hi

I have prepared by SAP PI and ECC environment for SAP ABAP Proxies.

I have generated and activated an ABAP proxy of an outbound service interface in SAP ECC to SAP PI.

for SAP PI7.3 how are you meant to set up a iFlow configuration to allow for SAP ECC to send to SAP PI. For my sender I have my SAP Business System and the associated service interface from my SWCV. What should go into the sender channel ?