The 4mm 3 wires Wago connector is a useful electrical fitting. Often, it needs to be secured to a base plate. Wago do have base clips, but inconvenient to get hold of. Here is my design for a quick solution.

My mount accommodates two, three and five-way Wago 221 connectors. The connector securely clips into the mount with a positive "clip" sound. With a bit of care, the connector can be removed from the mount and remounted as you work.

Wago 221 connectors have a rear access test point. My mount includes an opening which, if aligned with the test point provides clear access.

My mount has a hole for a 6g (3.5mm) countersunk mounting screw. Other screw head types will interfere with the Wago fitting, so are unsuitable.

I had good success in PETG and PLA+ printed mounts. I noticed that Wago's own mount system is made from PA66 (NYLON).

Here is my 3D design. My design may match your needs, too.

My print is made with eSUN PLA+ 1.75mm Orange filament, with 0.2mm layer height and 100% infill on a Bambu X1 Carbon printer. Print supports proposed when printing in the vertical direction.

I hope that you can find this print useful, too.

Remember to leave me some feedback or even a tip to keep me enthused to make more of these drawings.