The ornamental design for a connector, as shown and described.
FIG. 1 is a top perspective view of the connector in accordance with an embodiment of our design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is front view thereof;
FIG. 6 is top view thereof;
FIG. 7 is bottom view thereof;
FIG. 8 is a top perspective view of the connector in accordance with an alternate embodiment of our design;
FIG. 9 is a right side view thereof;
FIG. 10 is a left side view thereof;
FIG. 11 is a rear view thereof;
FIG. 12 is front view thereof;
FIG. 13 is top view thereof; and,
FIG. 14 is bottom view thereof.
The broken lines showing a turn knob and protruding elements in the second embodiment are for the purposes of illustrating environment and form no part of the claimed design.