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Yeah, the green is the copper panel inside the switch that changes position. The reason this switch has three positions is so we can wire it the way we do, which is power is off while the switch is pressed, or the other way, power is on when the switch is pressed. If your switch comes with its metal bit infron of the switch you will have to pry the top of the switch off to get it out and can see how they do it in there. don't worry, I had no idea what I was doing the first time I wired this either!