It’s a good idea and I appreciate the effort. But I’m sure there is a non-negligible amount of people, myself included, who see that shape and think “Red Star - Russia”.

This session is over then, I’m unable to help you. Take it to the repair center.

The Type B plug that printers usually use does fit without any issues, unfortunately. It even has that satisfying “bump” when you overcome the spring pressure, that tells you it’s in place.