Are SATA,USB, Ethernet, mouse, keyboard, serial/parallel ports connected to Southbridge via PCI bus?

From Wikipedia:

I was wondering how to understand the right-down corner of the picture?

Are SATA,USB, Ethernet, mouse, keyboard, and serial/parallel ports connected to Southbridge via PCI bus? In other words, are the buses from Southbridge and Super I/O to "Cables and ports leading-off board" PCI buses?

Answer

Are SATA,USB, Ethernet, mouse, keyboard, and serial/parallel ports connected to Southbridge via PCI bus? I

No those items are only connected to the southbridge and super-io chips

are the buses from Southbridge and Super I/O to "Cables and ports leading-off board" PCI buses?

The lines to "cables and ports ..." are the respective rs232, USB etc types of electrical connection, not PCI