Yeah so there's a black box controller on the board, labelled 120volt. Power in terminals are labeled "power" and you can see the connection to the controller on the board. Beside that is the relay. Power out pins (labeled with "o-/ o" for the relay) are connected to the output side of the relay. The only other pins are the chinese labeled pins that you're not supposed to hook anything up to, and the pins for the temp sensor, which is working great... bummer... when I looked at yours last week, I saw you had some extra pins - one set for heating, one set for cooling, if I saw correctly... Chris's is the same...