The ornamental design for a head-mounted attachment member for display, as shown and described.
FIG. 1 is a front view of a head-mounted attachment member for display showing my new design;
FIG. 2 is a rear 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 perspective view thereof;
FIG. 8 is a reference view showing an example of the usage of the subject design; and,
FIG. 9 is another reference view showing an example of the usage of the subject design.
The broken lines depict portions of the head-mounted attachment member for display that form no part of the claimed design. FIGS. 8-9 show environmental structure only and form no part of the claimed design.