I wasn't able to reply back yesterday, a thunderstorm knock out my power.
I used your diagram and hooked up the lamp. The lamp went on and off as the Guru was adjusting the temperature. I'm not an engineer, but I think that the microprocessor in the Guru is sending a signal to a microprocessor in the Raptor, which then controls the on/off power to the smoker. I don't believe it is just a simple on/off relay.