1995 Discovery 1 300TDI Automatic without EDC

I wired a new alarm system to my car and would like to wire it so it closes all four windows. The alarm has one lead for windows and it is timed to provide negative power for a few seconds upon locking the car .

I was able to trace the wires for the two front windows, with the help of Rave, to the ECU unit and with the help of a relay I wired them successfully. I only needed to supply ground to one wire for the driver side window and ground to one wire on the passenger sides window.
The rear windows have been a problem as the wires on the console switches don't go directly to the ECU unit and I couldn't figure out which wire or wires are responsible for closing.

I would appreciate any help or guidance.

Thanks