The ornamental design for an endoscopeoperatingunit, as shown and described.
FIG. 1 is a front perspective view of an endoscope operating unit showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.
The appearance of the endoscope operating unit shown in broken lines depict unclaimed portions of the endoscope operating unit only and forms no part of the claimed design.