I need some help from you Electrolux experts out there. I have a model LX that the rear cover has a half moon (sort of) groove milled into the up-swoop (for lack of a better term)area just below the blower port. Also, just above the blower port there is a threaded hole that something screws into. That is what I need to know, what screwed into it? All the cordwinders I have seen attach with a thumbscrew deal type clamp that more or less attaches via the blower port itself. Your mission kids, should you decide to accept it, is to report back on this.. Thanks, Rick