We claim the ornamental design for a medal mounting adapter, as shown and described.
FIG. 1 is a perspective view of a medal mounting adapter, illustrated in a folded configuration, showing our new design;
FIG. 2 is a front elevational view thereof, illustrated in a partially open configuration;
FIG. 3 is a rear elevational view thereof, illustrated in the partially open configuration;
FIG. 4 is a left-side elevational view thereof, illustrated in the partially open configuration, the right-side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof, illustrated in the partially open configuration; and
FIG. 6 is a bottom plan view thereof, illustrated in the partially open configuration; and,
FIG. 7 is a perspective view thereof, illustrated in a flat configuration.
The broken lines showing medals and a medal bracket in FIG. 1 are included for the purpose of illustrating the invention in use, and form no part of the claimed design.