Looks like your trying to use it for you keezer with 2 temp probs one in the coffin the other in the chamber. Looks like a light bulb in the box as heating device. What looks like electrical boxes is throwing me off. Power should go directly into the controller and then outputs go to each device you want to control. My understanding of your setup is you want to run the fans all the time, Correct? then the chamber you want to control the temperature.
Just trying to understand what you want to do. Castermmt
BobbyFromNJ has a you-tube video that shows how to do this.