Hi, I am a home theater neophyte. I have set up my own simple surround sound theater once, many years ago, but it didn't last as the cables were always in the way. I am considering buying a home that already has home theater wiring run behind the walls. The home is vacant, so I can see the cables, but not the hardware that would have been hooked up to it. Would you help me identify what I am looking at in these pictures. Also, should the rear speaker wire be covered like it is in the pics? I don't see any exposed metal to attack a speaker to. Can you tell if this wiring has ever even been used? I see see what looks like a PC video cable in one of the cable bundles. Is that for a projector? Thanks for any help you can provide.