groygmc Might be worth it to reach out directly to the company: https://www.citybug.com/contact.aspx
Pretty strange though … I wonder if they just used a 5-pin connector because it’s what they had lying around but not all of the pins are active.
If you have a multimeter, you could see if all the pins are active and jerry rig any generic 36V scooter charger to connect to it.