Keyless push button start

[C101971]

I came up with the great idea of a push button start but keyless. In theory a smiple task but for the life of me can't find out what all the wires do. I forgot to take a picture of the back of the ignition to see where the wires originally went so now I'm lost. I have a push button with 2 terminals, one side power and the other the starter. I also have an accessory switch but the truck only starts when all the wires are touching. I have no idea what does what and I don't want to fry something. My truck is a 1971 GMC c15 with dash ignition