maybe overkill but i took mine off the car and used a jump lead to the big nut from the battery +ve, jump lead to the metal part of the housing to the battery -ve, and then just a normal bit of wire to the trigger wire terminal from the battery +ve. be careful though, it has a lot of torque and will twist about in the bay if not properly secured, and support the engine from the bottom when you remove it as the three bolts are also used for mounting to the front engine mount.