The ornamental design for a wall mount magnetictarget, as shown and described.
FIG. 1 is a perspective view showing the new design for a wall mount magnetic target;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof; and,
FIG. 4 is a side view thereof, which side view is substantially same whether the side view is from the top, bottom, left side, or right side thereof.
The portions of the wall mount magnetic target depicted by broken lines form no part of the claimed design. Any shading in the figures is provided to illustrate contour only, and is not an indication of texture, gloss, etc.