I claim the ornamental design for an electrical rocker switch actuator, as shown and described.
FIG. 1 is a top plan view of an eletcrical rocker switch actuator showing my new design.
FIG. 2 is a left side elevational view thereof, the right side being a mirror image thereof; and,
FIG. 3 is an in elevational end view thereof, the opposite end view being a mirror image thereof.
The broken/ phantom lines show the environment for the claimed design and are offered for illustrative purposes only, and form no part of the claimed design.