Id highly recomond staying away from the fuel pump. If you forget to switch it on, and the fuel pump runs dry too many times, you will kill the fuel pump. (a new one costs about $200)

on the other hand wiring it to the ignition switch, or even the clutch switch is alot better. I hooked mine up to the clutch switch. It does no damage if i try to start the car with the switch on/or off. In my old car i hid the switch inside the hand brake. You have you stick your finger in the gap to toggle the switch on/off. Its very very discreet. and no one would look there.