Actually, I just thought of something since FastJew's post...
Shortening it to use only the 2 closest headrest posts may be a wise idea. If you use 2 posts on one side, and one on the far seat, that'll require both seats to be aligned very close to each other. If you use only 2 posts, it'll allow for the passenger to adjust the seat to his liking, and then you can adjust the camera to the bar's new position.
Plans for this winter
