The ornamental design for a cutting boardconnector, as shown and described.
FIG. 1 is a top perspective view of a cutting board connector of the present design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a rear view thereof; and,
FIG. 8 is a front view thereof.
The broken lines showing the legs of the cutting board connector are for the purpose of illustrating portions of the environmental structure and form no part of the claimed design.