This scooter has two 12v 20Amh batteries in a box. The batteries were replaced w/o noting the connections. There is one red, one black and one yellow all of the same guage. The batteries are connected in series with a short greenish jumper wire. The red goes to the remaining positive terminal and the black goes to the remaining negative terminal but where does the yellow go???
It likely goes to the same terminal as the red to make 24 volts. Or does it go to the first battery to provide 12 volts for say lights??
If there is a DC to DC converter in the chassis wiring that could step down the 24 volts to power the 12 volt lights.
The charger only connects to the red and green wires thru a connector.
But I just do not know. Help greatly appreciated.