The ornamental design for a cablebox, as shown and described.
FIG. 1 is a top plan view of a cable box in accordance with my design, with a top cover in a closed position;
FIG. 2 is a front elevational view of the cable box, with the top cover in an open position;
FIG. 3 is a right side elevational view of the cable box with the top cover thereof in an open position, and with the left side elevational view being a mirror image thereof;
FIG. 4 is a top plan view of the cable box with the top cover in an open position;
FIG. 5 is an exploded front-right perspective view of the cable box thereof;
FIG. 6 is a front elevational view of the cable box, with the top cover in a closed position, the rear elevational view being a mirror image thereof; and,
FIG. 7 is a right side elevational view of the cable box with the top cover in a closed position, the left side elevational view being a mirror image thereof.
The broken lines in the drawings are for the purpose of illustrating portions of the cable box that form no part of the claimed design.