We claim an ornamental design for a mounting holder, as shown and described.
FIG. 1 is a front perspective view of a mounting holder showing the claimed design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a left view thereof;
FIG. 7 is a right view of thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is a rear perspective of FIG. 1 shown in a position of use with exemplary environmental subject matter of a camera.
The evenly broken lines are included for the purpose of illustrating environmental subject matter of an exemplary camera and parts of the article that form no part of the claimed design. The dash-dot-dash lines represent the boundaries of the claim and form no part of the claimed design.
The broken lines shown in FIGS. 1-4 and 9 between the star-shaped outer and inner opening are included to show unclaimed space that form no part of the claim.