Thule T Track Adapter 697 6 (20mm for Powerclick G2/G3)

"The T Track Adapter 697 6 from Thule is the ideal solution for anyone looking for an elegant and practical alternative to the traditional mounting of roof boxes. This ingenious system makes it possible to attach roof boxes directly in the T-groove of load carrier rails, which not only improves the appearance but also optimizes aerodynamics. The adapter is specially designed for load carrier rails with a T-groove width of 20 mm and thus offers a perfectly fitting solution for a wide range of vehicles."
"The T Track adapter eliminates the need for manual tightening around the load carrier bar, as it replaces Thule's Power-Click fastening system. This makes attaching and removing the roof boxes not only faster, but also safer. The adapter is compatible with a range of Thule roof boxes, including the Excellence, Excellence XT, Dynamic, Flow, Motion XT, Force XT, Spirit 820 and Atlantis M (200) models, so you have the flexibility to use your preferred roof box."
"This adapter is particularly useful for anyone who frequently needs to change or remove their roof boxes, as it makes handling much easier. In addition, the clever fastening in the Tgroove ensures that the load carrier rails can be used optimally without the need for additional tensioning systems"