Someone was contemplating putting a 11-13 mirror with the compass in a 14+ PPV. For the compass you would need power and ground but I also though maybe we could get the passenger air bag warning working in there so they could use a different dome light housing if they wanted. Comparing the airbag warning from WM to WN it seems like there is an extra wire so not sure it is handled the same way from model to model.
Anyway here is the pinouts and I will try to populate some connector info as I find it.
WM (11-13) Mirror Connector
WN (14+) Passenger Airbag Indicator