I have a 2003 3.4L

I want to flush out my cooling system.
I saw a flush kit at the auto parts store.
It says to hook uo to the heater intake hose and connect a garden hose.
Can someone tell me where this heater intake hose is located on this vehicle? Please.

Or if you have other ideas about how to flush the cooling system i would appreciate the advice. Thanks

 

heater core is coming out of your firewall, most likely on the passenger side see #10 there are 2 hoses coming out, I think you connect to the upper hose to flush your rad.....

 

the only hoses i see going into the firewall are two black hoses on driver side of motor they come off a black pipe that goes around front of motor and driver side. the pipe originates on top of the water pump. Any ideas?