It was necessary to make a narrow socket, because. There is limited space in the extension cord between outlets.
Of the spare parts: a smart relay, an adapter for sockets, 4 fused bonnets and 4 screws for M2.
Printed on PETG. Attention!!! Not safe, plastic is not fire resistant, do not use for a large load.

Creality

Ender 3 Pro

No

Yes

Lower part (place as in the screenshot):
Seam position - front left
Fill density 100%
Bottom and lid thickness 2mm
Wall thickness 2mm
Support template - grid (with a zigzag and a different density, the bottom of the model after the supports is not even)
Support Density 27%

Upper part (place as in the screenshot):
Seam position - rear left
Fill density 100%
Bottom and lid thickness 2mm
Wall thickness 2mm
Support pattern - zigzag
Support Density 20%

Overall dimensions of the socket D77xSh36xH69
Drill for the bottom of the socket 3.8mm, for screws 2mm.
Drill for the top of the socket 5mm.
Fixing the socket with M2x8 screws, M2x3 fused-in bolt, added an option for self-tapping screws.