Can't remember exactly what colour wires are on what terminals without looking, but I'm pretty sure its a double plug with two red wires, to + side, and some black wires on - side, only 2 I think, the 3rd spade is free for when its plugged into oscilloscope. But don't quote me on that. They may be reversed polarity. And don't go sticking a screwdriver in it. Also Some coils become damaged when breaking the neutral so don't mess I'd say until your 100%. sure..if I remember 2mrw ill have a butchers at mine, or maybe pm rj if he doesn't mind me saying!!