Cable Matters Double Gang Speaker Wire Wall Plate, Gold Plated Speaker Wall Plate with Banana Plug Binding Post for 6 Speakers, White

Instead of just bare red and black speaker wires, There may be a wall plate with "banana plugs" that looks something like this in a closet, shelf, or your basement. Or sometimes even your living room if the previous owners had their av receiver there with a "zone 2" audio output