I bought a plug in keyless entry sytem on Ebay for my 1989 E34 525i (M20) manufactured in 9/88 (Apparently one of the first E34s). We were all set to install it today. The system plugs into the 12 pin connector which the instructions said was under the back seat on the passenger side. Not there. I went on line and found a post claiming it may be behind the driver's side kick panel. Not there. ANY IDEAS WHERE IT IS? Thank you!