receiver connections.. .I had it once (1 Viewer)

A while ago I had my two receivers connected allowing me to use one for the main listening area and the other to operate at the same time which pumped audio to a different part of the house. I did not pay atention to the connection that was made. I still have the Y adapters that the salesman sold me in order to do this. AGH! Any help out there? I posted in the tweaks, connection area without luck. There's got to be someone out there who knows how to help me, please?