Both of those diagrams have HIGH/LOW/REVERSE, the difference is that the left one switches the batteries
between Series and Parallel, while the right one switches the motors
. The left is the factory wiring configuration found on very early model 12V Power Wheels, and the right one is found on newer models.
Using the left diagram, you would have no permanent
. But if your vehicle has the left wiring configuration, you could 'flip it' using Taz's method