/etc/X11/cursors/ is in comixcursors-lefthanded 0.9-2.
This file is owned by root:root, with mode 0o755.
..
/etc/X11/cursors/ComixCursors-LH-Black.theme
/etc/X11/cursors/ComixCursors-LH-Blue.theme
/etc/X11/cursors/ComixCursors-LH-Green.theme
/etc/X11/cursors/ComixCursors-LH-Orange.theme
/etc/X11/cursors/ComixCursors-LH-Red.theme
/etc/X11/cursors/ComixCursors-LH-Slim-Black.theme
/etc/X11/cursors/ComixCursors-LH-Slim-Blue.theme
/etc/X11/cursors/ComixCursors-LH-Slim-Green.theme
/etc/X11/cursors/ComixCursors-LH-Slim-Orange.theme
/etc/X11/cursors/ComixCursors-LH-Slim-Red.theme
/etc/X11/cursors/ComixCursors-LH-Slim-White.theme
/etc/X11/cursors/ComixCursors-LH-White.theme