The ornamental design for a displayscreen for a control panel of an endoscope, as shown and described.
FIG. 1 is a front elevational view of a first embodiment of a display screen for a control panel of an endoscope showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is an enlarged front elevational view thereof;
FIG. 4 is a front elevational view of a second embodiment of a display screen for a control panel of an endoscope showing my new design;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is an enlarged front elevational view thereof.
The features shown in broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. The dot-dashed lines denote the boundary of the claim, and form no part of the claimed design.