Alarm sensors on a 203

[The mallard]

Can anyone tell me where the bonnet and tailgate sensors are on a 203 coupe? I assume the door light switches are the sensors for the doors.

I am trying to resolve an erratic alarm problem on my car, unfortunately last time it was on a star diagnostic courtesy of a MB healthcheck, the computer had difficulty communicating with the car and numerous exclamation marks appeared, and the MB operator did not seem to know why, so star diagnosis may not help.

Thanks