Generally any breather hoses from the head will go to the top of the airbox, with a crank-case breather going to the bottom of it.
Soooo, if there are hoses connected to the airbox - what have you connected the other ends of them to?
The over-flow breathers from the top of the carbs generally just route down the back of the engine, along with the tank breather hose.
Other than that there should be the fuel hose from the tap to the carbs, and probably a vacuum pipe from the inlet tracts to the petrol tap.
What else have you got left over?
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