Sys-usb verify correct usb controler attachment

I use a desktop computer and I want to use a usb camera. During the first installation I was not able to create a usb-vm because I use a usb-keyboard.

Following this guide (USB qubes | Qubes OS)

I have done steps 1 to 7. My keyboard is on bus 005

[user@dom0 Desktop]$ lsusb | grep Keyboard
Bus 005 Device 002: ID 1a2c:002e China Resource Semico Co., Ltd USB Keyboard

the bus 005 has the id 0e:00.3

[user@dom0 Desktop]$ readlink /sys/bus/usb/devices/usb5

and the command line options look ok

[user@dom0 Desktop]$ cat /proc/cmdline 
placeholder root=/dev/mapper/qubes_dom0-root ro rd.luks.uuid=luks-2213124b-01a3-4420-8086-33479998d66e plymouth.ignore-serial-consoles rd.driver.pre=btrfs rhgb quiet usbcore.authorized_default=0 rd.qubes.dom0_usb=0e:00.3

How do I verify that the bus is attached to dom0 before I continue setting up sys-usb? I’m very afraid of locking myself.

I also checked

[user@dom0 Desktop]$ qvm-pci | grep 0e_00.3
dom0:0e_00.3  USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller 

but there is no column USED BY which for comparison looks like this for an attached device.

dom0:05_00.0  Ethernet controller: Intel Corporation I211 Gigabit Network Connection                                                 sys-net

Thanks in advance!