where the location of the radiator inlet hose?

I have a 89 burb I am trying to locate the inlet hose on the radiator to install a temp probe. It needs to be installed close the the water inlet to the radiator. Is this the top hose or the bottom. I a assumeing its the top hose but I hate to assume.
thanks

Top hose is the inlet to the radiator. Bottom hose is inlet to the engine.

I couldn't have said it better myself................so I won't!!:D