which of the two small pipes on the side are the sensor line for the thermostat and the heater line?
im not familiar with 4age motors so dont know what goes where etc in this picture

obviously bottom pipe to bottom rad pipe and big top pipe goes to water pump
i assume the pipe coming from the rear of the engine is the heater outlet/return after its been in the cabin and the one exiting the front by the radiator top hose is the sensor line as it just goes to the thermostat but just want to make sure
also what temp do they open at?i assume somewhere around 80-85?
cheers guys