Timmus wired mine for me.
It feeds from the area around the courtesy light and sunroof wiring. So there must be an ignition feed in there somewhere.
Hi,
I can't be sure if the OpenSky wiring can be used to source power. The feed for the motor is permanently live, and then there is a discrete (0 or 1) signal on a smaller core to activate the buttons on the interior light with the ignition. I'm not sure if you'll be able to pull even a small current through this signal cable, but it's worth looking into more!
Regards,
Matt.
Matt, did you get any further looking into wiring a dashcam via the OSS feed? Thanks!