The ornamental design for a unitcell of endoscopetip attachment, as shown and described.
FIG. 1 is a top, front, right perspective view of a unit cell of endoscope tip attachment, showing our new design;
FIG. 2 is a top, rear, right perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines of even length shown in the drawings depict portions of the unit cell of endoscope tip attachment that form no part of the claimed design. The uneven length broken lines depict the boundary of the claimed design and form no part thereof.