what kind of terminals do they have there are the two large cables which go one on each of the large terminals. There usually one small wire with a terminal with a large hole that goes on the cable that comes from the battery. Then there is a small wire with a terminal with a small hole that goes on the small post. Or a small female spade the goes on the male spade terminal. Then on the solenoid you have leaves a small spade with nothing on it you would simply make a jumper wire and plug it on the remaining spade terminal and the other end straight to ground