Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Move
MDATA_RANDOMIZE_MOVE
Parameter: Scale
MDATA_RANDOMIZE_SCALE
Parameter: Rotate
MDATA_RANDOMIZE_ROTATE
Parameter: Seed
MDATA_RANDOMIZE_SEED