Convert Li-Ion battery-powered toy to regular battery
That's the board that receives control data and drives the motors for moving and steering. One set of two wires goes to motor that controls the steering angle and one set of two wires goes to motor that rotates the wheels.
You could try to replace the batteries with C or D cells that you can charge in an external charger. But we can't see if the current lithium batteries are in series or parallel, so we'd need more info to suggest how to successfully replace them.