1995 SAAB 9000 alarm system activated with no remote to dis

Electrical problem
1995 Saab 9000 4 cyl Front Wheel Drive Automatic

I have a 95 saab 9000 aero with automatic transmission that I bought used and needed to replace the drivers side half shaft, had the vehicle towed to a friends house to have the work done. The battery was dead and had it charged while half shaft was replaced by me, and now the car will not start due to the alarm being activated and no way to turn it off as there were no remotes when car was purchased. Is there a way to bypass the alarm system and have the car start