How to Install Motherboard in Case (Step by Step Photos)
In case you're wondering, the plastic IO cover/shroud is removable on the GIGABYTE GA-AX370-Gaming K7 (and probably also on the gaming 5). This is what's beneath. : r/Amd
I/O Shield For ASUS ROG MAXIMUS XII HERO (WI-FI) Motherboard Backplate IO | eBay
Free STL file IO cover for MSI motherboard・3D printing design to download・Cults
3D Printed IO, 24pin and PCI slot cover - Cases and Mods - Linus Tech Tips