Ikea Linnamon Headphone holder

I have an Ikea Linnamon table. I have lots of headphones, and I mean lots. Sometimes I like to switch but I only have 1 stand so I decided to make a holder, it's very basic but it comes with a screw to use on smaller tables. the widest opening is 34mm which is the size of the linnamon table top, The screw should clamp down something 2cm or thicker, it is just barely too small for my ikea pc desk hutch, that measures 19mm thick and it's a mill or 2 too thin. I could use paper to close the gap. If