69 Barracuda Parking Lamps - Are they different?

Hey guys,
I need a quick confirmation. I bought replacement lenses for my parking lamps. While replacing them, one is not fitting. Upon closer look I now believe the lamps are identical and I'm afraid I have two rights or two lefts.
Are there distinct sides?
How do I determine what side I have? It looks like the back of the housing has a slight angle to it. My guess is the slimmer back edge of the housing is beside the headlamp and I have two rights (passenger). Now, if I have two rights it would make a wrong in this case, lol.
Any help is appreciated.