I HAD THE SAME PROBLEM. CALL PIONEER CANADA. THESES ARE BLACK PLUGS THAT HAVE TWO BLADES ON EACH + -- PER PLUG. ON THE OTHER SIDE IS TWO SCREWS + -- FOR YOUR WIRES. YOU WILL NEED ONE PER SPEAKER . A = 2. B = 2. C = 2. TOTAL= 6. PLUGS.= SPEAKERS.......