It's an easy one I think. Which side does the euro rear fog go on. I've seen is put on both the driver and passenger side, but which side is the truly authentic side to have it on? I guess it will work on either side and I ahd thought it was to be on the driver side. Also when ordering the red lens is it necessary to order it for one side or the other or is it a unifersal part for both sides? Thanks for helping clear this up.