It’s a glue on mirror. Place it where it gives you a good view to the rear but doesn’t obstruct your passenger side forward view, clears the sun visors, and, doesn’t have you constantly bashing your head on entry. You’ll find it is a very specific location with little latitude.
Lastly, make you use a mirror with a “dimming” function as everyone’s low beams are high beams when they are following a Europa.