check for a sticker on the inside of the door that opens, I would have never seen mine had someone not pointed it out. Also I mine they are left to right instead of top to bottom. My right one is the feed from the roof for satellite, then you need to jumper wire that to the one next to it for living room. the other two are for bedroom tv, if your satellite has to outputs then you would jumper the bottom two together to feed the bedroom tv. There is a document in the HUG area that is titled getting started with Satellite TV check that out, also the Audio Visual document in there, They are very helpful.