Importing CAD Model Library into Unity,Importing Model libray

Hi, I hope, this is relevant question.
I do have a lot of CAD models and I am new to Unity. I have found this library: GitHub - i2e-haw-hamburg/cad-in-unity: Loading CAD into Unity 3D applications, that should allow me to import CAD models. But I don’t know how to import those libraries into Unity. Can somebody please help me?

Thank you for any response.,

Or do I have to call it in C# script?