You need the wires from the switch to the 1st picture. The second picture doesn't show where the factory runs a wire from the switch to this receiver board, not the big main board.

The purpose of the wire is to discharge static electricity in the event the antenna hits something electrically charged. All I know is that every time I hooked up that wire, that big gray resistor on the big main board got really hot and started smoking. I have a bag full of blown boards. Since I left that off after taking the advice of others, no more blow ups. I guess I might be at risk for blowing the board if the antenna touches the wrong thing, but at least I get to drive the tank!