kenmore heavy duty stacking washer/dryer ?

after repairing the pressure tube for the water level switch i was putting every thing back including the dryer vent tube the part that runs between the lint bbasket and the vent motor and Iam not sure if it rests against the foam collar or if it needs to twist into the collar just before the vent fan? It seems to fit very loose when it just resting against the collar foam and there was a ton of lint all over the inside control parts etc. The model #is 417.94872302 made 02/06