The RF remote switch (think Garage door opener) would be to operate the relay cut out feature from in the car without having to run any wires through the engine bay firewall. And there is no such thing as a rocket switch except in a rocket perhaps, I say it's typo' and it's really a "Rocker" switch which is an actual type.I basically understand the wiring diagram... But what is the purpose of the RF switch? And what is the purpose of the remote control? Did you run the rocket switch to your dashboard?