Where is all the 5 (4?) key lock locations?

[Mars Lunari]

I actually did it before with no problems on normal mode, but now on hard mode I'm derping extremely hard and I'm forgetting one of the lock locations. Forgot if it was 4 or 5 you needed to get to unlock the last area.

no idea which one I'm missing

[Ampenah]

http://www.arrpeegeez.com/2016/01/fnaf-world-walkthrough-guide.html