Use an RCA audio cable to connect from the Port’s AUDIO OUT to the receiver’s AUDIO IN.

This looks like a very straight forward answer - so much so that I would expect there’s more to the question. @Wehrlich13 Not to mock you but you really did not notice the connections labelled “Audio out” on the Port?

What receiver, some have port mapping functions that could be an issue.

If you have something (other than a non-preamp phono) plugged into it that is working now, just swap the connection to the Port’s outputs and see if that is working. If so put the Port back to your original connection and troubleshoot the receiver's settings as it should work with no issues.