If you use my remix https://www.printables.com/de/model/744992-remix-of-a-standalone-back-belong-to-the-modular-c to make a 3 part panel, then you need a bracket for mounting at an IKEA Lack table. I've use PETG to have an uniform look, but PLA will work too.
You can print this model with an MK3s+ but you have to place the model diagonally at the printer bed.
The author marked this model as their own original creation.