The Option button connects to a remote module that you hook into a garage door opener switch wire. You could probably use the module inline with the switch wire for the rear door solenoid for the same effect.

I wired the rear door solenoid into my new CompuSTAR alarm (into the 3rd button - depress for 2 seconds). That is one sweet alarm with plenty of leads for additional accessories. Plus the auto-start feature and 1.2 mile remote paging in awesome. I've had the alarm for months and I'm glad I finally installed it.

Next I'm going to get a module to close the windows and sunroof when the alarm is set, and wire the windows and sunroof to the 4th button as an auxillary to remote open the windows. Wish I had done this mod sooner.

-- Best, John