Jim's comments are referring to a cub that was 12 volts from the factory, not one that was converted. One that was converted from 6 volts to 12 volts can still be connected the same as the original 6 volt connection, except you need to pay attention to polarity. Normal polarity is 6 volt = + ground = red lead to ground and black clip on starter stud. Normal polarity for 12 volts is the opposite. 12 volts = neg. (-) ground, = red clip on battery lead, and black on ground.