It seems like they're talking about, what I've heard refered to as, the motor thermal cut out or thermal overload. It that self resetting bimetallic switch inside the motor that opens when gets to hot and closes when it cools down. Those should just be two 18 gaugeish wires coming up from the motor with the motor leads going into the controller and usually labeled P1 & P2 from the motor. You can jump them out or get an adjustable thermistor and wire it in place of the one from the motor so you still have protection
