Hello guys.. new here, with a 2003 C70 convertible. My rear view mirror is a little bit loose, and droops after going over a few bumps... Can anyone pls advise how to tighten this? I've had a good look at it and think maybe to somehow prise open/remove the little central vertical cover on the rear of the mirror to possibly reveal a nut, but not 100% sure...?

thanks
frank