Here's the main electrical contactor. Note the color coding on the block that corresponds to the wires' colored insulation. Make sure to use the provided cover boots (slid back on the wires during installation) to prevent short circuits. After we'd connected the main wires to the electrical contactor, we searched for a mounting location on the Rhino's frame. The wires should be run, so that they don't contact the suspension or the tires. Wires also need protection from sharp edges and from any source of abrasion.