Reading the manual the aquarite controller has 4 lugs for power, and in 240V you should use 1 and 4 for your load lines, and a jumper between 2-3. Can someone tell me what this jumper looks like? I purchased a used system and I'm only seeing the 4 screws, and 2 pieces of metal backing behind them that don't look like jumpers to me. They look flat and bend over the terminal input with a little hole. I'm thinking I don't have a jumper? Or these 2 are the jumpers and I have to move them.