there's a small enclosure behind the light under the fender, dismantle it all, it house the connection for the light, I used the stock connection and cut is as far from the connector as possible to give you plenty of play, and oops, room. the length of the new plate wire should be more than ample. Now you're going to have judge where you want to make cut so as leave enough slack, twist, solder, heat wrap, you can reassemble the housing and put connector back in or do what I dd, slid a large diameter heat wrap over the wire before connecting and when done, slid it over and hit it with the heat gun, zip tie with loop in wire, I'd like to get some kind of insert/isolator for the wire as it goes rhrough the fender, but for now heat wrap.
Many of my friends are very critical about the scoots and would surely tell me if it looked mickey mouse.
careful with the heat gun