The ornamental design for a circuitboardconnector, as shown and described.
FIG. 1 is a top, front and right side perspective view of a circuit board connector showing our new design;
FIG. 2 is a top, rear and right side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan side view thereof; and,
FIG. 7 is a right side elevation view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating unclaimed environment only, and form no part of the claimed design.