The ornamental design for a connector, as shown and described.
FIG. 1 is a perspective view of the top, front, and right side of a connector showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design. Also, the dot-dash broken lines define the boundaries of the claimed portion and the non-claimed portion.