An adapter that lets you hard mount the Thrustmaster TH8S shifter to your sim rig.
Remove the original screw clamp and screw in the adapter either from the top or the middle. An M6 (longer than 30mm in length) screw can then be inserted from the side with the flange to secure it in place.
Based on Urbanpirate's replacement for the original screw clamp (https://www.printables.com/model/1322162-thrustmaster-th8s-screw-clamp-replacement).