Based on my search, here is the likely explanation and what you can do instead:

Locate the round, silver on the motherboard.

Turn off the computer completely and pull out the AC power cord.

Typically includes 5x SATA 3.0 (6Gb/s) ports for storage drives. Internal Headers: 1x USB 3.0 header. 2x USB 2.0 headers. 1x Front Panel Audio header.