The plug connector (1) has a water-tight cover (3). This is rotatably mounted near the open connection region (2) of the connector (1) to open and close. A stop element (12) prevents the opening and closing movement of the cover (3). At least one of the top element (12) and an area against which this element abuts, is elastically deformable. The stop element (12) can be brought into contact with the abutment area in such a way that it can be held in the intermediate stop position (b), and the stop element (12) can move to a position via the intermediate position.
