The ornamental design for a manikinhead for wall mount, as shown and described.
FIG. 1 is a top plan view of a manikin head showing my design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a right side-elevation view thereof;
FIG. 4 is a left side-elevation view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a perspective view thereof; and,
FIG. 8 is a perspective view showing how the manikin head is mounted to a wall.
Broken lines in FIG. 8 show a wall and a bracket for the manikin head, and form no part of the claimed design. Broken lines in FIG. 6 show a hole, and form no part of the claimed design.