Which Tacx Campagnolo Freehub Body (Type I or II) I need for my Tacx Flux 2 (T2980)

I am installing a 12 speed campagnolo cassette on my Tacx Flux 2 (T2980) 2020. For this I purchased the T2875.51 freehub as advised by the garmin/tacx rep here in Dubai. When I installed the cassette the cogs are not sitting tight on the freehub after I tighten the lock ring. Is it possible I have the wrong freehub? The shimano/sram compatible freehub that came with the trainer is the T2875.01. Please advise.