The ornamental design for a cover for a surface mount control box, as shown and described.
FIG. 1 is a perspective view of a cover for a surface mount control box of the present invention.
FIG. 2 is a perspective view of the cover for a surface mount control box of FIG. 1, with the cover in the closed position.
FIG. 3 is a top view of the cover for a surface mount control box of FIG. 1, with the cover in the closed position.
FIG. 4 is a top view of the cover for a surface mount control box of FIG. 1.
FIG. 5 is a left side view of the cover for a surface mount control box of FIG. 1.
FIG. 6 is a right side view of the cover for a surface mount control box of FIG. 1.
FIG. 7 is a front view of the cover for a surface mount control box of FIG. 1.
FIG. 8 is a back view of the cover for a surface mount control box of FIG. 1 with the cover in the closed position; and,
FIG. 9 is a bottom view of the cover for a surface mount control box of FIG. 1.
The broken lines in FIGS. 1-9 of the surface mount control box to which the claimed cover is mounted is for illustrative purposes only and forms no part of the claimed design.