1980 kawasaki kz550 Ltd wiring question

Hi I'm trying to figure out where these wires go. The Grey one is coming off my main harness and the yellow and black come off my engine run switch.I can't understand the diagram so I was hoping someone can help me wire these in.   

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Dave 
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Yellow is the power supply to the kill switch from the ignition switch
Black goes to the clutch switch on the left handlebar
Yellow/black is ground
Grey is normally "right" turn signal but I can't see that splice on a diagram.

As Dave mentioned, please put an intro in the new members section

I apologize about not doing that guys just posted one there. Would a 1980 Ltd us spec  have a clutch switch? I am thinking someone pieced together this bike and now I got my hands full of a basket case.

It should have one- it’s there to stop the starter engaging if the bike is in gear

I'll definitely have to order one then because I don't have one. My ignition switch has a brown wire not a Yellow wire. Do I still hook up to the ignition switch? I'll try to get a photo up

Here's the picture 

You are going to need to use the wiring diagram and work it though, it looks like the ignition switch may have been changed at some time as this diagram below shows different colours to what you have and only 5 wires