I claim the ornamental design for a fluid reservoir support bracket, as shown and described.
FIG. 1 is a perspective view taken from the top and front of a fluid reservoir support bracket showing my new design, the broken line showing a vehicle frame portion illustrative of environmental matter only for the attachment thereof and forming no part of the claimed design;
FIG. 2 is a further perspective view taken from the top and front of the fluid reservoir support bracket shown in FIG. 1 and illustrating my new design in its separate form;
FIG. 3 is a right side elevational view of the fluid reservoir support bracket, the left side elevational view being the mirror image thereof;
FIG. 4 is a top view of the fluid reservoir support bracket;
FIG. 5 is a bottom view of the fluid reservoir support bracket;
FIG. 6 is a front view of the fluid reservoir support bracket; and,
FIG. 7 is a rear view of the fluid reservoir support bracket.