I put one in on mine and I've just ripped it out cos it was sooo fucking annoying lol

Any RST has got the connector plug in it (its the yellow 5 pin one behind the clocks)

You just need the loom that goes from there to the sensors in the engine bay and the one in the fuel tank.

The sensor for the fuel tank is already there (lift up the back seats and you'll see the plug hanging out)

Grab me on MSN if you want to know any more