I use this version of wire connector instead of WAGO. Couldn't find any available for 2020 extrusion, so I designed one.
I printed with the following settings:
wall loops: 4
bottom layer: 5
layer height= 0.2mm
Infill 40% for strength
with Adaptive Cubic pattern
you will need M3 x 8mm screws with M3 T-nuts for mounting on the extrusion. I went with M3 purely because I got more of M3 than M5s or M4s for that matter.
The author marked this model as their own original creation.