How do you disable the alarm system on a Mazda 929?

As I managed Midas store, I had my best tech install aftermarket alarm with remote start and he spent whole winter trying to disable factory alarm on my wife's 92' 929 - he previously worked as an installer. It took me one evening to find that the only solution is to move trunk sensor out of position which is in the bottom part of the trunk latch. You will lose trunk light, but so far this the only way.