Clifford Se2020x

I recently bought a 1994 BMW 530i wagon and found that it had a security system the seller knew nothing about. 

I found it when the battery died and I looked at the battery - under the passenger side rear seat.  There are two plastic boxes by the battery, one is about 1 1/4 x 4 x 6 inches and says SE2020x on it and the other is some sort of magnetic shock or motion sensor.

The car also has a small speaker or microphone, about an inch square in the upper right corner of the windshield and what looks like an antenna connection on one of the inside rear side windows.  There is no owners manual so all of this is a mystery.

When I look on the www.Directtechs.com website for help from Clifford's manufacturer it seems like you need to be one of their dealers to get access to it.  They also DO NOT have an alarm system with the SE2020x name or anything like it. 

Any suggestions?

Thanks

Does anyone have a wiring and operations manual for the Clifford alarm?

http://www.directed.com/guides/manuals/og/clifford/se2020_owners.pdf