Adapt Thule 594 sidearm bike carrier to T-slot style roof rack?

Thule T-Track Accessory Kit REI Co-op thule t slot T-track Adapter to fit Thule FreeRide, FastRide or TopRide to the t-track on factory bars by vehicle manufacturers such as BMW and Renault with track slot size thule t slot bolts Elegant alternative to tightening anything around the load carrier bar Fits load carrier bars with T-track width 20 mm Replaces standard Thule roof box

thule fietsendrager slot Thule Roof Box T-track Adapter 20mm - The Journey Centre Fits roof box directly into the T-track of the load carrier bar