What is this orifice that fuel is leaking from?

What is this in the red circle? Fuel is leaking pretty badly from here. If its not coming from there then there must be a crack in the housing because fuel leaks profusely even at idle.

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I checked there and its dry. After removing the paint, I found the source. There is a pin hole pictured inside that diviot. I am pretty sure that it should not be there so now I am interested in fixes. JB weld maybe? When I turn the carb over, fuel leaks from here.

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