Heater inlet hose?

[92G50Q45]

..About to do a backflush on the 240.

Which heater hose is the inlet?

There are two, upper and lower coming through the firewall, on the left (Passenger) side.

I looked at the FSM. ..It's misleading as to which is which.

Thanks

Never mind, Traced both down. One leads to the back of the engine and the other goes to the t-stat housing. I'm going to assume it's the one leading behind the engine. ..Thanks anyway, guys.
Modified by 92G50Q45 at 11:57 AM 2/1/2010