Generically, if a battery pack has a connection to the charger with more than two wires, it means it communicates with the charger in some way. What this means for charging depends on the design of the system--usually it means that if they can't talk to each other, charging does not occur.
It is nominally there to prevent problems that can lead to a fire, but it is also designed this way to prevent end-users from using anything outside that specific system with that bike, both to make support for the company simpler, and so they can make more money by selling system-specific replacement parts.
Without hacking the battery to bypass it's internal protection and safety electronics (BMS) it's unlikely to be able to be charged except with the system-specific charger.
Doing this bypass may either present a safety problem (since the safety electronics cannot stop the charger from overcharging the battery or otherwise damaging it if something goes wrong), or it may prevent the battery from working with the bike it is for, since the system probably also communicates with the battery and wont' operate without the right answers.
The charger itself also probably wont' engage without the right answers from the battery, so unless you can figure out the communications needed, or whatever signals are expected on those wires, it probably isn't usable outside the system it was made for.
