i have had for a while now an apexi turbo timer not the most hitech of them all but everything i need!

im going to set the time manually so i dont need to connect it to a/f sensors etc.

i just want to take the key out the ignition lock the doors walk away and let the car shut its self down in the time i have set.

where do i have to wire it too? is it all at the ignition barrel or is it a little more complicated than that!