Then you leave it alone. btw, there are problems wiring it up with a single relay. If you look at page 4 post #34 of this thread you will see what I'm talking about.
The diagram on post #48 on page 5 is how I wired mine up.
there is also a simplified version that works like the original post but uses the three relays posted here:
The three relay setup keeps everything wired like the ignition switch but uses relays instead.