Two years late to the party, but any chance you (or anyone) know what piece that is? I'm still stuck on two endings trying to figure out how to do the others, and I know the animatronic is one but I can't figure out how to make it work.
Okay, so this is pretty embarrassing..
I cannot remember what I did. Ironically enough, I actually did a playthrough of the game for YouTube. So I decided to just re-watch that and.. I cannot believe I am saying this, I told myself in the video, "I am just doing a general play through of the game, if you want to know the actual details, go find a walkthrough."
Jesus Christ I think I just trolled myself. I need to re-play the game and do a better job. I don't know what I was thinking!