I could not find a wiring diagram for for a 2000 Windsor and compared it to my 2002, looks very similar.
Attached is a parts page for my front section of the passenger side electrical bay, it shows the slide controller item #6.
Also attached is the wiring diagram, it shows the slide controller but has no details on the wiring path.
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi