[SOLVED] Where is my USB 2.0 port?

I have an old desktop with 4 physical USB 1.1 ports, but lsusb reports a 5th 2.0 port. The machine's physical appearance corresponds with the User's Guide:

Where or what could it possibly be?
Code:-- USB DEVICES (lsusb) --

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

-- USB DEVICES (lsusb -t) --

Bus 05.Port 1: Device 1, Class=root_hub, Driver=ohci-pci/2p, 12Mbit/s
Bus 04.Port 1: Device 1, Class=root_hub, Driver=ohci-pci/3p, 12Mbit/s
Bus 03.Port 1: Device 1, Class=root_hub, Driver=uhci_hcd/2p, 12Mbit/s
Bus 02.Port 1: Device 1, Class=root_hub, Driver=uhci_hcd/2p, 12Mbit/s
Bus 01.Port 1: Device 1, Class=root_hub, Driver=ehci-pci/5p, 480Mbit/s

Bus 001 Device 001:
ID = 1d6b:0002 Linux Foundation 2.0 root hub
USB Version = 2.00
Manufacturer = Linux 4.4.95 ehci_hcd
Product = EHCI Host Controller
Serial Number = 0000:03:0d.2
Class = Hub