My microphone and my headphones have separate cables since they are separate units. I wanted to be able to keep the two cables together to make cable management less of a headache since my pug puppy keeps getting tangled in the cables when I'm playing iRacing, so I came up with these little S-shaped clips to do just that. The big side is designed for a 3.75mm cable, the small side for a 2.5mm cable. Those cable sizes are the same as a standard USB cable and the smaller headphone cable size, like the cable that comes with earbuds.

Designed in Fusion 360, F360 file added for whatever reason...