The only tricky part was getting the Daylight Sensor to daylight. I fed a wire through the handlebar from the righthand side, then down the steering column. This takes patience and a bit of luck. I then taped the Daylight Sensor to the wire and pulled it up and out the end of the handlebar.
My luck ran out with the turn signal beepers. I chose to connect them to the rear signals, because I was afraid of moisture and corrosion if I connected to the front signals. Mounting is easy enough. But the beepers I bought (Radio Shack #273-060, 86db) are not loud enough in that location. I can not hear the beepers on the freeway or in heavy street traffic.
For beeper information see: http://www.modernvespa.com/forum/viewtopic.php?t=5677&highlight=piezo+buzzer
Daylight Sensor (below brake handle)
Rear turn signal