Modular attachment accessory

FIG. 1 is an upper, right perspective view of an exemplary embodiment of a modular attachment accessory, showing my new design;

FIG. 2 is an upper, left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown throughout the various figures depict additional structures that form no part of the claimed design.