Thank you for your input.
I figured something out late last nigth, by trial and error.
I took a look on the Light chip forom SlotIt, and thought, there is not a lot of components
on that! perhaps I dont need that so I connected the LEDs directly to the connector to the
light board.
There are 3 pins, seen from the drive direction: 1. is very bright when the car is running on
my true tire (a strait with a PSU directly to the rails)
2. is less bright
3. is ground
So I soldered the front lights to the 1. and the 3.
and the 4 rear LEDs to 2. and 3.
It works, Not sure if I should have a resistor in front of the LEDs though?