Need to find a replacement for a 5 Pin Giant charger. Do I need the other 3 pins to be active?

TheBikeMan

Pedelecer
Mar 23, 2018
58
1
60
Cardff UK
Most charges I have used only have 2 active wires, the positive and negative that goes into the battery. This old charger actually has the + & - but also has a blue/white/yellow combo going into the charger.
Does someone know the purpose of these 3 wires? What are they communicating to the charger? Are they necessary? Can we replace this charger with a standard 42V + / - charger if we attach the old connector and just solder the +/- wires in to the new charger?
 

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