The ornamental design for rear legs and upper cross connections for a chair, as shown and described.
FIG. 1 is a front perspective view of rear legs and upper cross connections
for a chair showing my new design wherein the broken line showing of an
armless chair is for illustrative purposes only and forms no part of the
claimed design;
FIG. 2 is a front perspective view thereof wherein the broken line showing
of a chair with arms is for illustrative purposes only and forms no part
of the claimed design; and,