The plug itself had been built into the light fixture and is basically just one solid metal prong. Closer inspection (once he pries it out of the outlet) will reveal slight groves in the sides, which are not mirrored. The outlet only has one hole in it to match the plug. Rust is not at a good angle while standing on top of the toilet to get more detail than that, and it's too far above his head while standing on the floor to see what the outlet's insides look like from there, either.

Rust spends 2 hours doing this and chatting, leaving him with 2 hours remaining before Day 004.