93 Pontiac Sunbird is dumping coolant...?

A few days ago it started overheating and dumping coolant...replaced the fan, checked the therm switch...looks like under the heater coil a little faucet...perhaps where a hose used to be connected...antifreeze is leaking from there? Help! It looks like a hose is missing or something. Checked the oil, too...no milky substance. Thanks.
 
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