I am trying to hook up a Vine TJ-610B-W WiFi thermostat to my heater. The original thermostat had only 2 wires, hooked to R and W, none hiding in the wall. I plan to use an external transformer for power. The problem comes when hooking up the new wires, I now have 4 wires and all I read say to hook the original 2 to R and W, then from the transformer to C and either RH or RC. Problem is the new thermostat only has and R. What I have is "R" "G" "W" "Y" "C" "W2" "..." "O/B-Y2"