Hello John,
you can find the step-by-step video tutorials as well as sample datasets on how to preserve the coordinate system of the fixed or bending camera setup in the application Help. Please go to ‘Re-use Alignment -> Full-body Scans and Coordinate System Preservation -> Coordinate system preservation with flight-log data’
As you mentioned, for the bending camera setup flight log can be used. You can also find the illustration how to place GCPs there.