You can convert the 19pin motherboard internal usb 3.0 port to external USB type C socket.
Single Port USB 3.1 Type C USB-C Female to USB 3.0 Motherboard 19pin Header cable
Description
Single Port USB 3.1 Type C USB-C Female to USB 3.0 Motherboard 19pin Header cable
Length: 40cm
You can convert the 19pin motherboard internal usb 3.0 port to external USB type C socket.
Support USB 3.0 5Gbps Max.