Hi Jordan -
On the passenger side mirror, I have one - added it back on. It was on the original vehicle and it showed on the data card, but it was lost it in it's history, so I added it back on - found the holes.
There's a post that discusses this somewhere, but the caution is that if you put it in the same position as the drivers side - you may have trouble seeing the passenger side mirror. It's partly a function of how tall you are, and the resulting line of sight. I placed mine back in the original spot, which is the same distance as the drivers side...and honestly, I have to strain my neck to see/use it.
....but it does look cool with two mirrors, and it is original!