here is what you should do i am sending you 2 links. one is a 72 wiring diagram. one is a 75 diagram. compare the 2 they are color coded so you should be able to tell what the remaining plugs go to. may have to switch light switch and plugs or hard wire.
http://www.mediafire.com/file/ionntmztqm4/2002 bmw.pdf
http://www.mediafire.com/?dzzmwti2tmn
http://www.mediafire.com/?ionntmztqm4
here is your 72 wiring diagram
http://www.mediafire.com/?wjh2t3dlv5m
and fuse box
take your time i will stick with you
i would say that was an accessories or added option such as delayed headlights
hook it up with out them and see if everything funtions
ASE Certified Technician
30 YEARS ALL MAKES AND MODELS DIESELS TDI, EUROPEAN AND ASIAN IMPORTS. ELECTRONICS SPECIALIST