2000 Saturn LS1 thermostat location

Where is the thermostat located? I can't find a picture anywhere on the web. I'm guessing at the top of the engine but some links talk about the bottom and some talk about somewhere behind the engine under the manifold. I have a friends car that needs one install and it doesn't have one in it which is a long story so what ever hose I disconnect won't reveal a thermostat located inside.