[burnin oil]

Just put a regular cable in it and leave it pulled out until you go to start the motor. That's all I do in my Mack. Pull the kill switch for the fuel and lock both transmissions in 1st. Truck stays put, even with pre spring brake air chambers on the truck. There is no reason to make things more difficult than it needs to be. If you want to think about failures it is possible for the contacts to weld themselves on a relay and keep the truck from shutting down. Just saying.