As promised....
1. Move the fog- and back-up-lights.
2. remove screws "1" (there are four) Don't touch "2"
3. remove the number-plate lights and ...gotta be brave for doing this... cut away the upper part
4. Install a standard number-plate holder with two stainless steel angles
5. Install one of the number-plate lights. I did it with a piece of aluminum sheet metal.
et voilà
)
