My 2000 Toyota Avalon XLS experience:
None of the shims one needs are in the rear brake pads and shim kit, PN 04466-AZ001-TM are the right ones for a 2000 Toyota Avalon XLS. This kit has four shims for some vehicle, not a 2000 Toyota Avalon XLS, & assumes that one reuses the anti-squeal shims & the little do-dad that makes noise when the pad is almost worn out to alert one that it's time to redo the brakes. I have no idea which Toyota uses these shims, but my Avalon does not...
Thankfully, the brake pads are the right ones.
If one needs the correct outer & anti-squeal shims & the little do-dad, rear brake pads 04466-41020 combined with rear shim kit 04945-06080 gets everything needed.