The ornamental design for a plugconnector, as shown and described.
FIG. 1 is a perspective view of a plug connector, showing our new design, with an unclaimed usage environment;
FIG. 2 is a side view thereof, without usage environment;
FIG. 3 is an end view thereof in the direction of the tip; and,
FIG. 4 is another perspective view thereof, with another unclaimed usage environment.
The broken line portion of the figure drawings is included to show unclaimed subject matter and usage environment only and forms no part of the claimed design.