If you have heavier headphones like mine you might need to hold it down with some tape, as it isn't balanced perfectly. Also, I stole the “Part Part” of the headphone holder from another person which I will link here: Headphone holder by polxuriach - Thingiverse :

Instructions: Glue the “Part Part” to the “Top Part” then stick and glue the “Top Part” in the “Bottom Part.”

hope you enjoy finally having a place for your headphones>

PEACE OUT

-Caleb