Davebrad Blue and white to me look like signal wires, Like something that would read how much battery life is remaining or sensor that reacts with heat if battery is overheated. Maybe it goes to the control cluster?
If you can’t get help from the factory, maybe a local battery service center could make you a new generic one here. They take apart the old battery then copy it and re-solder the wires in place and shrink wrap everything so its just like the old one with new batteries.
