Beat me to it. If you wanted to be overly fastidious, you could attach put one wire from each to a bullet connector and plug each of those into the OE connectors. The bolts are polarity independent.
I found that the female pins from a computer power supply, like the black and yellow wires that go to adapters for video boards were the correct size. I salvaged (hacked connector apart) a couple of those, then butt spliced both LED's and one of the wires with female pin together, put heat shrink around pin and plugged into male side on main harness,heat shrink that, no intermittent scotch locks in the future...
Motorcyclist Magazine just installed our fender eliminator and some bits on their long term 390. Read here... Motorcyclist Magazine review : 2015 KYM RC390 Long-Term Test
Just got this in the mail. Guessing I need to pull off the rear seat and get access to the bolts and wiring in there. Pretty self explanatory at that point?