Route the wire up the chassis following the factory harness towards the front of the truck away from any sources of heat. The supplied zip ties allow the cable to be tied in securely. The directions say to go to the engine compartment and then to the drivers’ foot well.
We went through the bottom of the cab using the e-brake cable grommet. If you need to poke a hole, use a grommet and paint the edge… this is Canada, and rust is a PITA (aka Pain In The Ass). We like these multiple size Daystar unit.
Depending on what truck you have, Pop & Lock directions let you know what harness and wires to splice into.
We HATE Scotchlocks, and loathe their existence, but in an effort to get out of our wives’ parking space posthaste, we reluctantly used them and have since soldered and spliced the connections ensuring years of trouble free service.
For those of us just looking to keep our tailgates from growing legs and wandering the neighbourhood, the Gate Defender comes in at a reasonable price for the security it provides and is not vehicle specific.