rear caliper seal kit on 1990 Nissan 300ZX

I bought a rear caliper seal kit from an autoparts store, for my 1987 Nissan 300zx 3.0l non-turbo. The caliper had some broken parts within the piston which look like o-ring bearings and a c-clip. The seal (rebuild) kit I purchased has rubber grommets and a wire e-clip. I can't figure out how it goes on. Any help with this will be appreciated.

Asked by for the 1990 Nissan 300ZX
Brakes are not to be guessed at. Have a qualified tech look at and repair this.