Im about to put a connector box on a mast and i found this advice

"If you were going down that road, I would suggest IP55 with plugged
drainholes facing down as this will allow any condensation (which is
bound to form with the wide range of temperatures it will
experience)to exhaust to the atmosphere without letting further
moisture in otherwise any moisture will be trapped inside and may
hasten a unit failure."

what are plugged drainholes ?

Parts