The ornamental design for a coverattachment for a wearable computing device, as shown and described.
FIG. 1 is a top left perspective view of my new design in its environment of use;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a front view thereof;
FIG. 7 is a rear view thereof; and,
FIG. 8 is an alternate perspective view of my new design in its environment of use.
The wearable computing device in the Figures is shown with dashed broken lines for illustrative purposes only and forms no part of the claimed design. The dashed broken lines that show portions of the cover attachment form no part of the claimed design.