Mounting Plate for Roof Box

FIG. 1 is a front elevational view of a mounting plate for roof box showing my new design; FIG. 2 is a rear elevational view thereof; FIG. 3 is a top plan view thereof; FIG. 4 is a bottom plan view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a bottom, front and right side perspective view thereof; FIG. 8 is a bottom, rear and left side perspective view thereof; and, FIG. 9 is a perspective view showing two mounting plates for roof box in a use state. The broken lines in FIG. 9 illustrate portions of the mounting plate for roof box and environmental subject matters that form no part of the claimed design.