I got the connector from China already even though it was supposed to take a couple months.
Couldn't find any info on the pinout online, so I took an educated guess that pin 1 was positive, and pin 2 was negative. I was getting slight voltage off those 2 pins from the Segway and figured that meant they were the live pins.
I guessed correctly and now the thing is charging. Happy to have fixed it for $1.59.
