The Lord is my shepherd. I shall not want.
These will typically beEthernet Extension Board included on the USB extension board though can be on their own boards as well.
Each laptop model will use a different USB configuration, some will use USB extension boards and some will just have the integrated USB ports that come on the motherboard. This extension board is used to stretch Ports to opposite sides of the laptop when it is not possible to use integrated ports. ...
If you flip the laptop over when it’s closed, you will encounter the Bottom Base of the laptop. This will usually have removable covers located somewhere on it (hard drive cover, Wi-Fi port cover, etc…).