What do these wires go to on my 78 KZ1000

I've spent several hours going through diagrams and all the components. I have everything else labeled and ready to go on. This pic shows THREE single wires and ONE white plastic three prong connector. I do not see what they go to on the diagrams. This is the very forward most section of the Kawasaki harness. The 1st wire on the left is a big double female connector that is BROWN,,,, The 2nd is a three prong connector but only two wires with a orange and a brown wire in the plastic,,,, The 3rd is a black with yellow stripe male connector,,,,, 4th is a brown with white stripe female connector. Help!

Black with yellow is ground - it's the same (theoretically) as the frame ground. The brown is almost always hot and the brown and white is usually associated with the headlight. The orange/purple one is a mystery.