FIG. 1 is a perspective view of a mirror mounting assembly according to the present design, showing the design mounted on one possible mirror support bar and supporting one possible mirror housing, both in dotted lines;

FIG. 2 is a perspective view of the mirror mounting assembly of FIG. 1;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof, it being understood that the opposite side is a mirror image;

FIG. 5 is a top view thereof; and,

FIG. 6 is a rear view thereof.

The broken line showing of a mirror and support bar is for illustrative purposes only and forms no part of the claimed design.