The ornamental design for an endplate for a ceiling fan blade, as shown and described.
FIG. 1 is a perspective view of an end plate for a ceiling fan blade showing our design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view thereof, shown in the environment of a ceiling fan blade.
The broken lines illustrate portions of the end plate for a ceiling fan blade and illustrate environmental structure. None of the broken lines form part of the claimed design.