I cannot figure it out either; one thought I had was it might even go in the front because when I look at the tie wirer on the license plate itself, it is not connected. The plate is just sitting there, so the whole plate could slide down and expose more of the light and bolt to the front bumper then wire up. Really, that is what gets me is the way the light looks Lucus English, adjustable, and stock. My first thoughts were home made, but now I am not sure. Maybe I should call Piggot and ask. Perhaps it fits European cars from the period that need a place to mount a license plate. I need to buy it and flip it.