Ok so I figured out that the green connector is for the dome light, this yellow is power all the time, and not sure what the black with blue tracker is but I think headlight switch to dome light. Anyone know if I'm missing a certain harness or something?
I take it this is 70 that you're working on? http://1bad6t.com/Maverick/repair/pdf/70maverickwiring.pdf
Yeah I believe so, generally aren't plugs that don't connect to something... Several circuits are fed from headlight circuit, this may help you...