On 04/11/2019 at 21:19, Kental said:

The wires are only on the estates & hatches have the same radio so I’m sticking with alarm sensors for the larger window 

 

The hatch use two wires in the heated rear screen for the same purpose, but this can be affected by the heated rear screen ring used occasionally.

 

100% they are ariel wires, because you can get continuity between their connectors and the back of the head unit.  

@cheezemonkhaiThanks for this and a big thank you from all the responses here,

case closed m'lud!😅