The ornamental design for an attachedtransparentpocket for a piece of carry-on luggage, as shown and described.
FIG. 1 is a rear right perspective view of an attached transparent pocket for a piece of carry-on luggage, the transparent pocket contained inside the luggage;
FIG. 2 is a rear right perspective view thereof, the transparent pocket exposed;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a top plan view thereof, and,
FIG. 7 is a bottom plan view thereof.
The broken lines illustrate portions of the attached transparent pocket for a piece of carry-on luggage and form no part of the claimed design.