The ornamental design for a glassshade mount for a contained candle, as shown and described.
FIG. 1 is a front perspective view of a glass shade mount for a contained candle showing the new design;
FIG. 2 is a front bottom perspective view thereof;
FIG. 3 is a front perspective view shown in a position of use thereof;
FIG. 4 is an exploded perspective view shown in a position of use thereof;
FIG. 5 is a front elevation view, the rear view being a mirror image thereof;
FIG. 6 is a left side elevation view the right side view being a mirror image thereof;
FIG. 7 is a top plan view; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawings illustrates the environment of the glass shade mount for a contained candle which forms no part of the claimed design.