Hello PierreB,
to reflect the settings shown in your example Reference Settings window, you can do:
import Metashape as ps
chunk = ps.app.document.chunk
chunk.crs = ps.CoordinateSystem('EPSG::32619') # set Coordinate System to WGS84/UTM19 N
chunk.euler_angles = ps.EulerAnglesOPK # set rotation angles to omega, phi, kappa
chunk.camera_location_accuracy = ps.Vector((0.05,0.05,0.05)) # set camera accuracy to 0.05 m
chunk.camera_rotation_accuracy = ps.Vector((0.35,0.35,0.35)) # set camera rotation accuracy to 0.35 deg
in Gui you would have the following...