European Electrical box (french at the very least) to clip on your Ikea Skadis.

Use at your own risk, but if you know what you're doing, it's fine.

There's a side hole for wires but you can pass through the board, depending on your configuration.

The box itself fits different sizes and different brands (well, it's standard :), including Legrand largest models.

There's 2versions : Vertical and Horizontal brackets.

The clip system is from :

Skadis T-Clip System // Line Arc Line, found on Printables. https://www.printables.com/@LineArcLine