How to reconnect my ASG residential alarm (no model availlabel)?

I have accidentally cut the wires of my workshop's alarm sensors (door & windows) while tilling the soil; the workshop is detached from the house. The house & the workshop are on one ASG-alarm system.
The workshop's windows & door are "tied" by a red and a black wire(probably in series).
The incoming wires from the house are four twisted pairs:
- solid green & white/green
- solid orange & white/orange
- solid blue & white/blue
- solid purple & white /purple
How/what combo to correctly hook things back up?
Pls don't bother telling me to call the service guy; thank you!
George