I am trying to do something... _Special_

So someday ago I tried to fit in the “Back Mounted Electronic Box By Teaching Tech” On my Ender3 (OG). Only problems… 1st: The box would not fit (The tolerances on my printer are awful) so I spent 2hrs sanding down the box. 2nd: The printer would not turn on, it took me a day to realize that I wired the cooling fan...