What are the 5 slots on an Aventon battery?

[spokewrench]

My Abound worked fine when I shut it down at 8:30 last night. At 8:30 this morning, the motor wouldn't run. The display had no troubleshooting help except to say the battery is at 92%. The speedometer works. The brake light is off unless I pull a lever. There was no response when I substituted an identical throttle.

I unplugged the motor and removed the controller. Nothing looked suspicious. The five blades to which the battery connects look find. I checked the corresponding slots in the battery. The three in the middle, A, B, and C, look fine. The end ones, labeled + and -, look bad. Is it possible that only the motor uses those two the end slots?

Two screws hold the connector in the battery, but I don't know if I could pry it out or buy a replacement. How about contact cleaner and a burnishing tool?

 

[Gionnirocket]

That's what I would try... Some contact cleaner should at the very least be a temporary fix if that's your problem.
That said if the display is working, the battery is making a connection.
As for the ABC connections there's many variables and that's specific to that bike and/or brand on what they do. Many times the power connection is in parallel so 2 slots for + and 2 for -