Ensure that drilling holes do not damage the vehicle or its wiring.
Protect cable runs from pinching, overheating and physical damage.
Use grommets to protect cables that pass through metal.
Use plastic straps and tie-downs to secure cables and connectors in their desired location, away from areas where they may get snagged or pulled.
Keep cables away from heat sources, grease, battery acid and other potential hazards.
Keep cables away from control pedals and other moving parts that may damage the cables or interfere with the operation of the vehicle.