Hi , noticed my c8 pollen filter box is all loose and moving around, i have taken it off and i can see whoever put the last filter in lost the clips that hold it at the back under the bulk head, i can buy a new filter box complete with clips but what is the rubber hose that pushes in to the bottom of it ? i see no way of attaching the hose to the housing once the filter is in place unless there is another part missing from the underside of my filter box . Again whoever replaced this filter last didnt put this hose back on by the look of it. any ideas and thanks in advance.