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I was offline, sorry you have had to wait. Let's see what I can find.
Here is the wiring diagram from Mitchell,
And here are the 2 from Chilton,
Pink or purple wire, flasher
light green wire, backup lights
purple wire, starter solenoid
purple/white wire, ignition switch
What other color wires do you have?
You need the plug that plugs into that switch or at least be able to look at ne to see what wires go where.
You asked for a wiring diagram. You should have explained what you need and that a wiring diagram is no good because you already had them
Do you have a manual trans, if so this should work, http://www.bobschevelleparts.com/1969-1973-neutral-safety-switch-harness-manual-transmission.html
Here is another but it too is for a manual trans, https://www.npdlink.com/store/products/harness_neutral_safety_switch_oe_style-115190-8.html
Here is another, http://www.restorationperformance.com/1969-1973-chevrolet-chevelle-el-camino-monte-carlo-neutral-safety-switch-harness/
Where did you go? I was trying to help you figure this out and you just disappear.
If it were me and you had no harness, I would attempt to figure out with an ohmmeter how that switch works. I would assume and big connections would be for the power and the starter solenoid purple wire, plus I would think that if you imagine the switch installed and pull the lever all the way toward you like you are shifting into park, there would be continuity with the ohmmeter between the power (big) connection and the other big connection that would go to the starter solenoid. There would also be continuity between that power connection and 2 clicks down from park, where neutral would be. Although, it's probably the same connection. Then you have to figure out which is for the reverse lights, so place the switch on the next position from park.
I would attempt to figure out with an ohmmeter how that switch works
Figure it out?
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