Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Random Mode
MGRANDOMEFFECTOR_MODEParameter: Synchronized
MGRANDOMEFFECTOR_SYNCParameter: Indexed
MGRANDOMEFFECTOR_INDEXEDParameter: Seed
MGRANDOMEFFECTOR_SEEDParameter: Space
MGRANDOMEFFECTOR_SPACEParameter: Animation Speed
MGRANDOMEFFECTOR_SPEEDParameter: Scale
MGRANDOMEFFECTOR_SCALE