The ornamental design for a side handle receiverwinch mount, as shown and described.
FIG. 1 is a top back left perspective view of a side handle receiver winch mount showing my new design;
FIG. 2 is a top front right perspective view thereof;
FIG. 3 is a bottom front right perspective view thereof;
FIG. 4 is a right side view thereof, the left side view being a mirror image thereof;
FIG. 5 is a back view thereof;
FIG. 6 is front view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is an environmental view thereof, showing a broken line illustrated dashed winch, roller assembly, hook, and ball assembly. The broken lines illustrate the environment in which the article embodying the design is used and form no part of the claimed design or of a specified embodiment thereof.