[Makita Generator Carburetor Question]

after some research I believe a 'welsh plug' may have come out.  The gen runs great.  It's just spraying fuel everywhere.   I assume these plugs can come loose?

[Makita Generator Carburetor Question]

My generator started leaking fuel from a small hole on top of the carburetor just behind the air filter.  The hole is supposed to be there, however, I can't tell if a screw fell out?  Even with the gen off it streams out of this hole as soon as I open the fuel valve.  Any ideas?