fuel cutoff install - wire location?

After a recent break-in/stereo jacking, and notice of the increased amount of stolen vehicles these days, I want to setup an inexpensive fuel cutoff until I have the fundage to afford more elaborate (read: pricey) anti-theft systems.

I understand that this is a basic breaking switch on the black/yellow wire at the fuelpump, but I want to install it inside the car, so it can be better hidden. I understand on some tegs (G3s, I think) it goes under the middle of the rear seats. Is this the same on G2s? (I have a 93 GS) Can anyone tell me where this wire travels, so I may get at in somewhere within the cab of my car? Thanks!

you could just take the fuel pump positive or negitive and just set it up on an .89 radio shack switch, or even better use a key switch for the fuel that utilizes a krypto lock (CAT has these on some of thier machines).

or even better put a switch on the main relay.