I have an Arntz, but I have a single reverse light under my car on the drivers side. It is very covert, only really noticable when it turns on.
It was a required piece of equipment in Wisconsin (though a defroster is also and I don't have one of those).
It was lifted from a mid 70's Honda Civic.
Look below the drivers side tail lights. On the many pictures of my car this is the only one where you can actually see what it looks like. On most it's just something in the shadow under the car.
