We claim the ornamental design for a folding cart side pouch, as shown and described.
FIG. 1 is a perspective view of a folding cart side pouch but showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is rear elevational view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a left side elevational view thereof.
The cross hatching shading is fragmentarily shown for ease of illustration, with the understanding that the cross hatching shading is uniformly continued over the surface on which it appears.
The broken lines shown in the figures show environment and form no part of the claimed design.