Here is my attempt to make it into the stickied thread!

Anyways, these are just deterrents, used to slow a person down from stealing your car. Whether your cars a POS or a BMW, people will take if they got the opportunity. So this will be used as an informative thread on Hidden Push starters and Kill Switches.
In my demo, I chose to use my cigarette lighter as my push button starter, note I also have 2 more kill switches in combination with my starter, but you can choose any style of button you like. Preferably a momentary button if your going to use it as a starter. Hide it wherever you believe to be a good spot. This will still require a key in the "On Position." This is also helpful in making your car a PIA to access. I actually like it this way.
Essentially I think this should work on any car, just as long as you double check your correct wiring. Find your ignition wire harness, then Go to
the12volt.com and find your vehicle. From here you will want to find the Alarm/Remote Start wiring.
Figure out which wire is the constant 12v wire & your starter wire. For the 94 Camry, I circled them in red in this picture below. The White wire is constant 12v & the Black with White stripe is the Camry's starter
1) You will want to cut the black & white (starter) wire before it gets to the plastic connector. This I believe disconnects the start from the key hole, but keeps everything afterwards thats still connected together on the black & white wire. Securely tape off the black & white wire from the car to the connector as you will not be using this anymore
2) Extend the black & white wire from the plastic housing to your start button's location. Attach it to one of the prongs of your button
3) Splice the constant 12v source from the plastic connector. Do not cut, as this 12v is used to power everything that is attached to the connector. Attach the spliced wire from the 12v to the other prong of your button.
See my horrible diagram below.
You will probably have to modify the cigarette light to not stick in when pushed, but do not take out the spun up coil! I learned the hard way, and if you wire up to the lighter, without the coil you cannot start the car
This will use the same 12v energy that is used to start the car. If you choose to use your cigarette lighter like i did, it will no longer work as a lighter. You can attach another one using the original cigarette lighter wiring harness.
Take out the cigarette lighter when you leave your car, and its pretty much like a key

BTW do not push the lighter while driving your car! The engine will stop!!