Changing manifold...have some heater line questions

I am changing my Edlebrock manifold on my 302 to the Holley manifold for the roots supercharger. The manifold has 2 ports for water lines and or temp sensor. The thermostat housing i am using is the Ford Motorsport one that comes off at a 45 degree angle and has just the port for the upper radiator hose and no other water lines. The way i have it set up now is the extra little line off the thermostat housing goes to one of the little ports on the water pump and the other port on the water pump goes to the heater. Can i run my heater off both of the ports on the water pump, or should i run one off the manifold, one off the water pump then plug the other one on the water pump?

thanks in advance,
Eric