The one on the housing next to the carbs is a drain, it is a tapered hose with a foam element inside & it should run out to the floor behind the engine.
As for the others, it sounds like you have got the plastic breather housing installed on the bottom of the airfilter box, right? Often that is done away with & the hose from the cam cover left to atmosphere, but it should go onto that with a drain to the floor on that too.