where do i place a loose tube leaking petrol in my mini midi moto?

there is a loose tube that comes out of the carburetor and leaks petrol in my 110cc, 4 stroke, unleaded petrol midi moto, if i block the tube, the bike wont kick start and petrol will leak from the air filter. i called the company i bought it from they said its a loose tube witch needs to be fitted back into place, but i have no idea where it needs to be fitted into.

note that the bike starts and runs perfectly but only leaks petrol and the tube is attached to the carburetor but loose from the other end were it leaks petrol from.