Part of the design is inspired by Dupont Cable Organizer Customizable by urish (https://www.thingiverse.com/thing:3232719).
And of course it is part of the Gridfinity System by Zack Freedman.
Connect base and top with the help of a drop of superglue.
Added my Fusion 360 source file for anyone who wants to customize it.
The author hasn't provided the model origin yet.