Does anybody know what the sensor (or whatever it is) is that’s on the right rear (facing forward) of the rear view mirror? I can’t find it in the owner’s manual and it’s not listed as part of the Honda Sense. I don’t think it’s the auto-dim for the mirror since that has 2 sensors facing rearward. And I don’t think it’s the auto-on for the headlights since that’s the bump in middle of dash near to the windshield (verified by covering it up and auto-on stopped working). I’m stumped. My WAG would be maybe it’s a photocell to keep mirror auto-dim from activating in daytime? Anybody know for sure?