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

I'm trying to install a Thule TopRide Bike Carrier on the BMW OEM roof rack and it looks like the T-track adapters don't quite fit into the

I'm trying to install a Thule TopRide Bike Carrier on the BMW OEM roof rack and it looks like the T-track adapters don't quite fit into the

thule slot Rotopax RX mounts 40lbs on-road, 25lbs off-road; T-Slot crossbars only

thule t slot DESCRIPTION: The kit includes 2-8X M8 heavy duty stainless steel roof rack quick mount T & C M8 T bolt with 16mm tread This channel nut fits: