Its funny how you can't find Segway UT10's complete wiring diagram anywhere on the web. This could help anyone for having wiring issues. I have a family member that purchased a '24 UT10-P and was in the same boat as you looking for pigtail plugs to fit the bus bar for installing a light bar wired harness. With all my research, I stumble across a pigtail that is usable with that bus bar, making life easier with wiring:
Finding this on Amazon:
Pulse Bus Bar Power Plug Pigtail Connector for Polaris Ranger XP 1000 / RZR/Pro RS1 General 2018 2019 2020 2021 Pulse Plug Bus Bar Harness Pigtail 3Pcs $9.99
Go, figure a Polaris item that fits a Segway.
Red Wire is Constant Power.
Blue Wire is Aux Power (Key On)
Black Wire is Neutral / Gnd.
I hope that helps anyone that is looking to tap into the Bus Bar and making their own harnesses or modifying a purchased harness.
Ford