Wanna give me some steps on how you did it? I'm looking into making one myself so I'm curious how others have made one. Did you drill into the undertray also?
I'll take some close-up pics when I get a chance and post them for you. Once you remove the mud guard unbolt the license plate light from it and remove the zip ties that secure the wire. You can then run the wire up the side of the frame. The plate holder I made consists of a carbon plate frame and two handlebar fluid reservoir brackets from Rizoma reservoirs which I was not using. They are bolted on through the threads where the handles use to be. I have a carbon undertray; however no drilling would be required in the OEM tray if you did it this way.