Whats the best way to route wiring on permanent installations?
The best way to route the cables is to strap them to the existing wiring harness bundle. You will receive cable ties with your kit. Follow the existing wire bundle right along to the cab interior and use a cable tie every 1 foot (.3m) or so. There is usually an extra vacant hole in the firewall to provide entry to the cab interior or you can squeeze in along side the existing harness. After cable installation, spray WD-40 on underside cables to achieve a more natural look. Within a week or two, not even the installer will be able tell which cable is which or that anything has been changed. If you really want to get crazy, then you can douse the entire top of the transmission and wire bundles with diesel fuel… This is a serious deterrent to prying eyes and not that unusual because if you have ever had a fuel line leak on the engine, as I have, then you will know that the entire transmission can be saturated very quickly.