The ornamental design for an X-link connector, as shown and described.
FIG. 1 is a perspective view of an X-link connector showing the design;
FIG. 2 is a left elevational view thereof;
FIG. 3 is a right elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken break lines indicate undetermined length of the connector. The portions between the break lines form no part of the claimed design. The broken lines form no part of the claimed design.