Electrolux made replacement chrome trim pieces for the top with the power receptacle so that when rebuilding model AE's they could be used with a powernozzle, which they never came with originally. Those same trim pieces got used on subsequent models when being rebuilt, either because that's the trim that was available or because it was thought a more convenient location for plugging in the cord than under the hose or down by the right front wheel where they frequently got accidentally yanked out while vacuuming. I know, I've experienced it myself!