We're further West, in the middle of nowhere about half an hour south of Angouleme, anyway here goes with the push button: on the ignition switch barrel, opposite end to the key there should be five wires... brown in the centre, to one side a white with red stripe and close to that a white with green stripe, opposite these two is a plain white wire. On my car the white/red wire has been disconnected (cut) from the ignition and is now connected to one side of the push button, the other side of the push button has been connected into the plain white wire which remains connected to the ignition.I hope this makes sense and doesn't result in a load of sparks!

Andrew