HELP.. Ignition wiring.

I need a pic and explanation as to what wires are for what on the back of the ignition switch for 66 ford econoline. Mine fell apart while taking it out of the dash. There are no letters or names for each wire. Acc,Off,On,Start. I have 4 wires on the plug and there were 3 wires on the bolt that holds the plug on to the switch. I am thinking the bolt is for accessories side of the ignition. But I am not sure. If anyone can help that would be great.

WOW..No one knows how the back of the 66 ignition plug wires are hooked up?(acc,off,on,start) Well it looks like I will have to figure it out, and I think I got it figured. Will probably need to go through all the wiring anyway, as it looks like a rats nest with diferent parts of 3 different harnesess put together. Thanks anyway for all those who looked and are still thinking on it.

http://www.fordfuelinjection.com/public/IgnitionSwitchConnector.gif
Don't know if this will help

Thanks whopman. I will check to see if mine looks the same as that first ignition. The only thing I think is different is the brake warning light. Either it's not on there or it was broke off and wired up seperetly.