Internal Usb Motherboard Connector What Is The Purpose Of Two 4-pin Connectors On The Motherboard On My New Computer?

What is the purpose of two 4-pin connectors on the motherboard on my new computer? - internal usb motherboard connector

Right next to these two compounds on the motherboard, the message "USB 2.0, but the team has 4 external USB ports on the back of the computer and two on the front. Both the internal connections of this" mysterious "is located on the motherboard and it there is nothing to connect to the outside to allow access without opening the computer case.

This is a 2.7 GHz Dual Core 6 GB of eMachines computers.