Used Festool Multifunction Table MFT 3 - Model and Design Guide https://www.printables.com/model/1094514-festool-multifunction-table-mft-3-model-and-design/ to ensure mount fits MFT table design
I took inspiration from Salih3D's Headset Holder https://www.printables.com/model/1120379-festool-mft-headset-holder
Credit to @ewg for the picture of the mount in action
The author remixed this model.
Revised the mounting clips to fit the MFT table rack structure