I claim the ornamental design for panels for slimming pant, as shown and described.
FIG. 1 is a front elevation view of a first panel for a slimming pant;
FIG. 2 is a back elevation view of a second panel for the slimming pant;
FIG. 3 is a left elevation view of the first and second panels for the slimming pant; and,
FIG. 4 is a right elevation view of the first and second panels for the slimming pant.
The dashed and broken lines depicting stitching and the human form, shown in the drawings, are for environmental structure only and form no part of the claimed design. The shading indicates stretching of the material.