Hello, new here or to any forum, and I don't work on cars. With research I found out I needed a new thermostat housing because it was leaking and draining my coolant. So I watched vids on how to replace it and then I found this leaking. (Circled in picture) was hoping someone could tell me what this is that is circled, because it's leaking too. Hope this is posted in the right spot, thanks.
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