if it's an unmolested K1, the green should end at the signal stalk bolt inside the bucket, and the male lug goes to a multi-terminal green. That's the ground wire. The black from each should have a little tag at the bullet end denoting color. Blue for right, orange for left.
If your signal stalks have 2 wires coming out of them, they're from a later bike, and the wiring is going to be different, but do able