Thanks for the info !
If someone know where to find the cables, please let me know.
Update:
I made extra cables from the rear lightunit to the front of the car. Driver side side light = gray-yellow, passenger side: green-yellow. Reverse light passenger side: purple.
There is a big connector at the rear on the driver side where all cables come together. But the source is going behind the plates so you can't follow them to tht front of the car. That's why I tapped them from the lightunit.
Speed puls line is white-orange. I have a Turbo Diesel and this cable is located at the passenger side, motorcompartment, at the bulkhead bottom connector of 3, pin 4. (I knew that one....

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Mebey there are others who can use this info.