I order mine as well the other day .. due in the end of October
Is there a how to use it for the nekked S somewhere?
I can give a rough "how to." Not near the bike, so I can't do photos nor confirm exact steps.
You'll find the connector under the driver's seat towards the right side of the machine. It's a red plug that sits in a holder. I use a flathead screwdriver to unseat it. (if you're looking back at the plug, it'll be the left side (but actual right side of the motorcycle) hope this makes sense)
After unseating the plug, turn the ignition on. Hold the UP arrow on the left side controls. You will see a menu pop up. Scroll up to highlight SERVICE, then hold the DOWN button. Now, you're in the service menu. You can plug your new connector into the red plug and it will allow you to reset service settings and see any FI codes that may be present.
I hope this helps. If I have anything wrong, please jump in and correct.