We claim the ornamental design for a connector, as shown and described.
FIG. 1 is a top perspective view of a connector of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a first side view thereof, the second side view being a mirror image thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is a cross-section view taken along the line 6-6 of FIG. 2.
The broken lines shown represent unclaimed subject matter and form no part of the claimed design. Additionally, the unevenly broken lines in the drawings define the limits of the claimed design.