FIG. 1 is a left side view of a wall attachment, according to my new design; FIG. 2 is a right side view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a bottom view thereof; FIG. 6 is a top view thereof; and, FIG. 7 is a right side top perspective view thereof.