i wired my passport; i connected the power/negative directly into the back of the power plug of the mirror. It has been 3 weeks with no issues. Do you need the diagram for the wiring?
My installs(minus the correct wiring. I do not remember at the moment)
I took a heavy duty tel line,
spliced the 2 middle wires,
went to radio shack bought tiny wiring pins,
solder the pins to the wire, (when i did not solder, the wires fell out)
crushed the pins flat.
Slide the 2 pins into the back of the mirror jack.
very easy, hardest part was not to confuse the +/-, the wiring digram on the net, have a different wiring colors for tel line versus network line.