Need some wiring help!

[NTM1971]

Good day all. I am attempting to fix the wiring mess the previous owner left me with on my 1971 Baywindow. The small grey one on the left is coming out of the fuse box, and has a small connector on the end. The red and black wires on the right are coming out of the wiring harness, and they also have small connectors on ends. Can someone give me an idea of where they should go? Thanks!

[VWDruid]

head lights?
EDIT: light switch

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70 Westy, 2027cc "dual DRLA 40 m140 i55 wjdoc a165 p33 v30 "w100 straight cut 040 polished heads 1.25 rockers 1.5 A1sidewinder supertrapp muffler trans 091 coil SUM-850500 CDI universal svda Pertronix
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It's not the straight cut gears It's the T.A.R.D.I.S. engine.
wanted Chameleon Circuit

[busdaddy]

Welcome.
If all 3 have the teeny tiny female spade connectors the grey one sounds like the wire to the door switch for the key buzzer and the red and black ones are for the brake warning light.
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[NTM1971]

Thanks guys! That gives me some place to start. Sigh, the person I bought the bus from stated "it has some electical issues". It probably had to do with all the "improvements" that were made. Most of the wiring was GNDN grade....