Hi Jeron,
I appreciate your posting the bleed procedure but I will not be going that route because I have the Blue-Point RADKITPLUS which, in theory, should refill the system without any air bubbles.
After I did some reading
here, I can answer my own question: the thermostat is located where the coolant mix
leaves the engine to go to the upper radiator hose. The lower radiator hose is the path where fluid enters the engine c/o the water pump.