Thanks for that, and I did reach out to him on the slim chance that his (likely new) battery will fit my (definitely not new) Radwagon! I got a bit misdirected as the connector has 4 pins but I suppose two of them aren't required.
Thanks again, much appreciated.

Good afternoon all; some villains made off with my Radwagon battery while the bike was parked outside a shop at the end of August. I've ordered and paid for a new battery from Rad EU (I'm in England - (it goes from bad to worse)) and they've not delivered. I'm going for a new battery from an alternative supplier.
Looking at the connectors on the bike at the bottom of the battery holder there are 4 pins - two large, two small. I'd assumed that two are pos/neg and two are for the BMS - does anyone know the wiring connections or have a diagram to help? Any info gratefully received - thanks in advance  .