I am repairing a 1984 camper van. I only finally found these and they match exactly what was in my Leisure Craft Camper. The only difference is that instead of the standard bulb, they have what I know as "wheat grain" bulbs. I was concerned at first when I discovered this, but I'm very happy with them. There are four small holes on the back. You simply take 2 or 4 wires from your RV or trailer and stick the bare wire into the hole. The wire slides into the bulb and is held in place by a small metal one-way cap. This valve prevents the wire from being easily pulled out of the holder. If you need to remove a wire, simply gently pry up the cover with a very small flathead screwdriver. I uninstalled and installed all 8 builds in about 2 hours. One thing I had to do with my old RV was either replace the old cord because it was very dirty. Make sure you either brush them well or season them so they touch well. If you don't have a good connection, the next line of light below the current one will not be powered. I even coated the wires with some petroleum jelly to ensure a good connection. It has nothing to do with the design of the light, just my old wiring on my RV. I can't find where to add pictures.
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