The ornamental design for a connector, as shown and described.
FIG. 1 is a perspective view of a connector.
FIG. 2 is a front view of the connector shown in FIG. 1.
FIG. 3 is a rear view of the connector shown in FIG. 1.
FIG. 4 is a right side view of the connector shown in FIG. 1, the left side being a mirror image thereof.
FIG. 5 is a top view of the connector shown in FIG. 1; and,
FIG. 6 is a bottom view of the connector shown in FIG. 1.
The broken lines immediately adjacent the shaded areas of the connector shown in the drawings represent the bounds of the claimed design while all other broken lines represent environmental structure and are for illustrative purposes only; the broken lines form no part of the claimed design.