That came with the K&N, I think they know what they're doing. The reason the green cotton one didn't is probably because it wasn't a full induction kit, in fact in the pic of Ems' that large rubbery looking hose is exactly the same hose as links my breather to the K&N, and I bet it's plugged into the breather.
It's essentially plugged in exactly where it would be on the std airbox - after the filter.
