Review on Astra Depot Solenoid Contactor 8000Lbs 12000Lbs by Andrew Holman

but if you find out it works. There is a picture of the wiring diagram for the small receiver box (small black box with 4 wires coming out of it), the center spade connector for the (-) wire, but you also need to get a ground wire to the battery from that same spade connector. I just connected a jumper wire from the center spade connector to where the negative battery wire connects. where is it? So if you have a large box, the mounting bracket is on the bottom and the 3 spade lugs are on the top. Then the top center of the large clamps is the negative (-) battery post, the bottom (center) is the battery positive (+) post and the red wire from the receiver box. The other two large terminals go to your motor. When you press the button, the external large terminals are turned on. hope that helps.