Not needed unless you have open airbox & exhaust. The wires go to the inside of the L&R throttle bodies, adapter plugs onto fuel injector wiring loom on both sides. This is were it gets power, then a ground wire. It's plug & play.
If you are going to tune your bike it is to be disconnected. Once you get done, install it, see if it's ok. If not, get rid of it.
It is to give more fueling at different points on the stock map, usually for open in & out.
If you need more info Todd sells PC's on the GuzziTech site, he has maps also for the PC.