Will be installing Navtool in H2 (05) for Back up Camera as soon as it arrives. Need to find the 12V reverse power in steering wheel column area so I don't have to run wire all the way from Back up lights to the Navtool unit. I plan to tap the Back uop lights for the Camera power. Also for someone that has installed the Navtool, can the wire going to parking brake ( it gets 12 -) go straight to chassis ground ??