found some pic on our dutch site.
You first have to remove the dashboard plating below the steering wheel that is mounted with screw's.
Then you have to remove the air tube.
To do that you first have to remove the plastic clip, See the red arrow. otherwise it will not let go.
Behind that you will find a blue box (that's the control box)
Take it out and open it carefully. After that you will see
The yellow arrow is for the right headlight
The blue arrow is for the left headlight.
The red arrow is for both, a sort of reset.
Because these switches are all minus it wil switch as soon as it wil get contact with te mass of the car. And your lights will go up and down... Flappy happy
Try it with a bit of wiring and you'll see
connect three wires
Put everything back together and place 2 or 3 switches (the reset one has to be a single seperate switch. You can put the right and left on one dual switch or two seperate ones).
See end result below in my sig.