http://www.helmetlight.com/
Check out this web site. on the 09 cat I just used the blue wire to brights. This allows you a switch,to turn on and off. Hit the bright on the bars and the wire will be hot. If not sure on which wire check with meter. Lead dog comes with good instructions. Only three wires to hook up. 1. to helmet light 2. to ground 3. is for break light. Really is not to difficult. For several years rode without light, got a lead dog tight this season really like