Help needed - connecting hoses

Hello to all!

Once again I need your help:



The "green" hose is well connected (I guess), but the "red" one I'm not sure if it is in the right position. What is that for?
What is the function of the "blue" box?

Sorry for the "newbie" thing!! Thank you!

red hose goes round the back of the carb, its for the warm air feed. blue box is the warm air diverter flap, on the bottom should be a hose to the shround bolted around the exhaust manifold

I'll check it! Thank you once again!!