The dark green, yellow, dark blue and light blue are tapped into the same color wires on the turn signal harness. The white wire of the turn harness is cut and one white wire from the flasher switch goes to one end and the other to the other end. Same for the purple wires. Orange goes to the flasher. "SPLICE WIRES AS SHOWN-SOLDER & TAPE" is on the 1964 instructions. I would solder and shrink wrap.
