The author remixed this model.
This holder takes the place of one of the cord management brackets (you only really need one anyway) and allows you to keep all of your bits and bobs organized. It has places for the following.
5 CNC Kitchen heat set insert tips
1 spare TS100/101 tip assembly
Hex key for TS100/101 tip exchange
You will need qty 5 M5 x 10 set screws, driven into the holes in the side of the holder. You then lightly screw the tips onto the set screws.
I printed mine out of Prusament PETG using the same settings recommended by Iconic-FAB.com for their stealth press parts.