Filament guide for an Ikea lack table enclosure.

Ikea lack enclosure filament guide - hole NOT for bowden tube, just straight for filament
Ikea lack enclosure filament guide BT - hole for bowden tube

Drill a 3/10 inch hole (or something close) and put in the hole, wide part on top. If using bowden tube, cut a 2 inch piece and glue it in the hole