Question about Thule VeloSpace XT 2 Black Edition

Regarding the clamp on a carbon MTB frame, can you really tighten it until it clicks? I have the card adapter (https://www.galaxus.ch/fr/s3/product/thule-adaptateur-de-cadre-porte-velo-6349021), but I'm really hesitant to tighten it until it clicks. Does anyone have any experience?