On the back of the GFX card there is a connector called 'Display Port' . The Oculus cable plugs in to that. The other cable is for a USB 3 port. That's all you need to connect.
Oculus Rift S - Oculus Quest 128GB MSI trident 3 7RB-200UK Intel Core i5-7400 3 Ghz x2 MSI GTX 1050 Ti (4GB) & MSI Aero GTX 1060 OC (6GB) & MSI Aero GTX 1070 OC 8GB 16 GB RAM x2, 1TB HDD x2, 1TB SSD x2 Windows 10 Home Edition Version 10.0.18363 Build 18363, Oculus version 17, Quest Version 17
Fan Cooling by Zotac FireStorm - AfterBurner cause me problems.