After activated perimeter alarm in GEM, there will be problem with hood lock. It is necessary to get this lock with alarm function. New from dealer or old item. Or the last possibility - you can modify current lock.
1. You will prepare about 6cm(2,4 in) long cable and modify according to the picture. Hole 6mm(0,236 in)
2. One of the end of cable put to the hole (yellow-black cable).