Looking at your picture they appear to be connected to the correct things. They both go to heater core. Have you insured there are no air bubbles in the heater core, or that it is not stopped up? I wouldn't think it should matter which one is connected to either inlets on heater core, its pretty much just a small radiator that air is blown across to transfer the heat from the coolant to the air being blown across it. Someone may chime in if I'm wrong here.