The ornamental design for a mount for a marine peripheral device, as shown and described.
FIG. 1 is a front perspective view of a mount for a marine peripheral device according to my new and ornamental design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The dash-dot broken lines show the boundaries of the claimed design. The portions of the mount for a marine peripheral device shown in broken lines form no part of the claimed design.