Need A Kill Switch Wiring Schematic

[Eyegore]

Well after my sons truck got stolen it seemed that the consense was to have a kill switch and now that I have two c-10's I think I better wire them up so I have some chance at keeping them. So do any of you have a schematic for wiring a switch up? My mechanic said he has not installed one in years and me and wiring do not mix (ask my wife she was standing there last year when I grabbed hot 120, I did that after she said "wouldn't it be wise to shut off the power?") So I'm looking for something to give my mechanic for my 86 and my sons 80 to wire up.

Thanks

Tom