saab 92x factory alarm w/ turbo timer

I need some advise on a 2005 92X with factory alarm (equivalence to Subaru WRX turbo).  I am in the middle of installing a Blitz DC III turbo timer.  My goal is to set the alarm while the turbo timer is counting down.  I saw from another web site whom someone has done it with cutting two wire on his 2002 WRX.  The 1st one is to cut the dark GREEN/ black at the keyless module(alarm) which sits on top of the fuse block module.  The 2nd wire to to cut is the grey wire which belongs to a module(sensor???) that reside inside the (parking) hand brake console. 

would someone know about this installation could advise rather this would work?  Since i don't know the nature of those wires, i am hesitate to follow it blindly.  if someone has some wiring diagram sort of related to the factory Subaru alarm, i think that would solve my doubts.   thanks very much for your time for reading.