Mystery wire in headlight harness

Dark green w/tracer and bullit connectors= are side marker lights, left and right, and unused in 1969 (a leftover from '68) as 1969 had reflectors and not lights. I own the same schematic as you and think it looks great hanging in my garage. It is full of inaccuracies. The only good diagram is in the FSM, not as pretty- just better.