What is hole in carb for?

[Old outboard dude]

What is the hole in the bottom left of the carb for in the picture? Should gasoline come out of it? Should something go there? Should gas only come out of it if it is tipped upside down? Please help

 

[racerone]

Fuel in the bowl must have atmospheric pressure on it.-----That is the vent for the bowl.----During normal operation fuel should not leak out of it.