Here you can see the general wiring between the main board, that is into the headlight, the engine, the battery and the rear light. 

   Here you can see the positioning and the electrical connections of the horn.

   Here you can see the connections of the various switch for the low/high beam, horn and lamps.

   Here you can see the "main board" inside the headlight.

Here you can see a little better the wiring inside the headlight, that basically is the connection of a distribution card, under a key to turn on/off the voltage, with a protection fuse of 10 amp to each user.