Ultimate cable organizer. You should add double-sided tape and have these velcro strips for cables and you are good to go. I've found this very useful as in some cases I have to add or remove cables and the velcro allows me to do it easily. It can handle 3 HDMI cables and more.
Keep in mind the direction of the print, as it needs to be on its side so it doesn't require any overhang. Use it as you like!
Edit: I added a longer version with holes for screws
The author marked this model as their own original creation.