Did this mod initially noticing the 4 pin connector was turning brown at the black wire which I assumed is ground. Did the mod anyways to see how well it worked and I really liked the mod. Went to check why the connector was toasting and it actually melted together after the mod requiring the connector to be cut out. Found that all 3 grounds from the headlight assembly were soldered and taped into one 14-16 awg wire that went into the connector socket, this was the cause of the connector toasting before and melting after the mod. Ran 4 separate grounds on ring terminals and bolted them to the cross brace behind fly screen using the mounting hole for the original connector. Then used a U-Haul flat 4 connector that lays perfectly in the cross brace and soldered up the White, Brown(used for red), and Yellow wires according to the mod. I must say this has greatly improved the performance of the lights and the bike electrically overall. It took less than 2 hours to fix this and about $20 for materials I did not already have. To diagnose and create the fix took an additional 3 hours so overall I spent a lot of time on this but think it is one of the best mods I have done on my 09 Uly!