It was mounted onto the fuse box right as close to the strong corners as possible. We also used the large square backing plate to keep the screws from pulling through the box. When the holes were drilled, we were careful to not drill through any of the diagrams on the underside of the fuse box lid incase we needed to reference it in the future. We then ran the wiring loom across to the driver side and through the firewall securing it with zip-ties along the way. There is also a ground wire that needs to be connected to a solid ground, we used a nearby screw in the body.