The specs of every needed connector are available.
Now try to get the specs for the car's keys. If you try, you might go to jail. NVidia doesn't sue you, at least.
It's a LEGAL product, guys. Take it or leave it. They aren't doing anything illegal or immoral. (Well, they *do* immoral stuff in many areas, like competition and market policies and manipulating or extorting reviewers, but not disclosing register specs is not immoral nor illegal.)