I opened things up, 1st picture is the battery charger, the 2nd is the battery control wires. The 3rd picture is the charging socket on the battery.
The charger has white, black and yellow wires running to the charger plug. The battery has black, red and a yellow wire to its charging port.
Taking that the charger's white wire is the positive line?
Guessing might need to replace both of the existing connections on the charger and the battery, if I can't find a connector to match the battery socket?
I have done some small soldering repairs in the past on my wife's laptop and various electrical repairs with success.
I'm I heading in the right direction?