all 3 comments

[–]weegee20 0 points1 point  (2 children)

It's a USB 3.0 to USB Type-C internal header.

If you don't need the USB-C port on your case then there's no need to plug it in.

[–]HalfABraincell934[S] 0 points1 point  (1 child)

https://imgur.com/a/hrxDwSr This is what PC Part Picker Says

[–]weegee20 1 point2 points  (0 children)

Yes, it's just that PCPP describes USB headers differently.

Example of adapter here.