/usr/bin/SystemPreferences is in systempreferences.app 1.2.0-2+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/GNUstep/Applications/SystemPreferences.app/SystemPreferences
/usr/bin/../lib/GNUstep/Applications/SystemPreferences.app/SystemPreferences