Onstar mirror harness path?

[IMkenNY]

I am in the process of replacing my boring 07 Redline Ion onstar rearview mirror with a 06 Saturn Vue mirror that has the automatic dimming, compass & outside temperature display.

Its nice to see the redline mirror harness contains the temperature sensor wire connections, does anyone know which piller is used to drop the headliner wiring harness down?

Even better does anyone know where the sensor wires terminate?

[IMkenNY]

Installation went well. here is some information if anyone else desides to do it.

I used a 2006 saturn Vue mirror ($45 shipped on Ebay), my existing 07 mirror wiring harness provided power and onstar functions with the exception of the microphone (I removed the mike from my old mirror and mounted it in the new one even though I dont plan on using onstar)

I didnt bother to use the temperature sensor wires which ran down the right rear pillar, I just ran the sensor from the front bumper through the firewall and attatached it at the mirror (gray/black and green/black). I had a sensor onhand but they are available on ebay as well for ~$25 shipped.