592236 A coupling assembly for fastening an adhesive wafer (34) to an ostomy appliance device (32), the coupling assembly including a captive connection (54) between the adhesive wafer and ostomy appliance that permits captive relative displacement between the entire adhesive wafer and the entrance aperture (42) of the appliance, to facilitate access to the wafer from the non-body-contacting side substantially without obstruction by the ostomy appliance. The limited motion connection is present in the coupling assembly in the operation position and in the access position. The coupling assembly further comprises a fixation coupling (56) for fixing the adhesive wafer in the operative position.