After moving I sadly found out that the caps which conceal the fitting to mount the lamp body are easily lost. So I sat down and modeled one of those Caps. Since I myself dont own a 3D Printer yet I only know that the printing itself went to plan (I sent the file to a friend of mine who did the actual printing) and without any adjustments needed.
Since both caps are symmetrical, this part is suitable for the right and left side of the lamp.
For exact measurements see pictures.

Since this is my first published Model, I would love to hear your feedback :)