Where is the front passenger side freeze plug on a 4.3 v 6?

Where is the front passenger side freeze plug on a 4.3 v 6?
its obvious once your under vehicle but the less obvious quesstion is why is it leaking has the motor been extremely overheated or exposed to freezing temps while not having the proper coolant if so this isnt your only problem its my experiance that freeze out plugs only come out of cracked blocks or motors that have been overheated to an insane amount so there is usually other damage hidden inside the motor