Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Checked
TAKEBASE_CHECKParameter: Index
TAKEBASE_INDEXParameter: Camera
TAKEBASE_CAMERAParameter: Render Settings
TAKEBASE_RDATAParameter: Override List
TAKEBASE_OVERRIDESParameter: Camera
TAKEBASE_CAMERA_COMBOParameter: Render Settings
TAKEBASE_RDATA_COMBOParameter: Notes
TAKEBASE_NOTES