'Cut the black wire, Bond, I say again, the BLACK wire................'
Then tape it up as when you put the key in and the switch is 'made' the balck wire becomes live as the voltage looks for the return path to earth so leaving a bare end could get nasty..........
That is of course if the link above points you to cutting the wires at the back of the ignition switch that feed the bleep bleep machine? I was too lazy to click on them.....