Using RFC with CAF

Hello Experts!

I want to do an CAF project using RFC and exposing my operation that invoke this RFC, but how to do it? i read this [article|SAP NetWeaver Composition Environment Tutorial Center; but i have not idea how to set destination on import RFC, the article on page 5 have a point to do it when import RFC for me does not appear it.

I have the rotine ready, but when i test the service and i got the error message : "External service not configured!", i think it is because i do not specify the destination.

Some help?

Regards, Ronaldo.