This is a remix of the original as it turns out there are two depths on the DIN spec a 15mm and a 7.5mm, I have the 7.5mm and the original model wouldn't fit the shallow depth.
I've also made a simple version without the Wago terminals, that's the one I printed for myself as it prints much quicker and I don't require the connectors in this case.
Thank you to the original creator for including the step files that allowed me to quickly make the changes I needed.
Update: Added the Fusion 360 files due to a request from another user.
The author remixed this model.
This is a remix of the original as it turns out there are two depths on the DIN spec a 15mm and a 7.5mm, I have the 7.5mm and the original model wouldn't fit the shallow depth.