The ornamental design for a rightrearsection for a car body, as shown and described.
FIG. 1 is a front-right perspective view of the right rear section for a car body, showing my new design;
FIG. 2 is a front-left perspective view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a frontal view thereof; and,
FIG. 8 is a rear view thereof.
The evenly broken line in the figure drawings represents unclaimed environment only and forms no part of the claimed design. The dash-dot broken line represents the boundaries and forms no part of the claimed design.