Automate Fiducial Registration

Related question,

How to use this module from cmd. It is not clear how to provide the landmarks as input ordered list arguments and it would be nice to add this to the module wiki. I tried:

   ~/sw/Slicer-4.8.1/Slicer --launch ~/sw/Slicer-4.8.1/lib/Slicer-4.8/cli-modules/FiducialRegistration --returnparameterfile transform.txt  --transformType  Rigid --saveTransform  --movingLandmarks -42.3584 -32.6622  24.675 -2.39974 -40.2918  -35.3744 -8.60695 -41.5944  --fixedLandmarks    -12.753 -180.318 -251.67 26.5668 -143.192 -246.78 -33.6808 -138.784

I also tried using [x y z ] or [x,y,z] and () in addition to provide the fixed and landmarks as fcsv files but nothing works

What is the correct format for providing the landmarks?