Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Move
MDATA_RANDOMIZE_MOVEParameter: Scale
MDATA_RANDOMIZE_SCALEParameter: Rotate
MDATA_RANDOMIZE_ROTATEParameter: Seed
MDATA_RANDOMIZE_SEED