There are two (proper) systems to lift the back of your motorbike with a paddock stand. These L-shaped adapters intend to rest the motorcycle’s swingarm in the rear paddock stand. For that reason, there’s a rubber finish.
If your swingarm has screw thread and the option to mount bobbins, then you’ll probably go for a V-shaped adapter.
These T-shaped adapters belong to the BIKE-LIFT Low Paddock stand Rear Wheel with V-adapter Red.
The connection to the paddock stand measures 2cm x 2cm.