I'm hooking up a camera system because I can't see crap around the truck.

I want to tap into the LH and RH turn lamps from within the cab, same for reverse light and Drive gear. I studied the wiring diagram and can't make much sense of it, does anyone know where to do this?

I have a 4 channel control box that would sit in the cab, so it would be much better to tap in the cab, rather than the trailer and or rear wires.