Do you want wire your beetle using "US-model taillights", taillights that can be used as a braking light and also as a turn signal light.

The easiest way is to use parts from USA model volkswagen, but if they are not available, and you must use euro parts, this is at least one way to do it.

Note: VW original wiring diagrams here

Link to my USA-model taillight wiring diagram (in Finnish)
Link to my USA-model taillight wiring instructions (in Finnish)