Five Nights at Freddy's Theories — FNaF 4: Pre Night 5 Mini Game

This mini game is the shortest one we have seen up to this point.  You are shown locked in the parts and services room.  Fredbear and Spring Bonnie spare heads can be seen along with endoskeleton

AF Blog: The Long and Winding Five Nights At Freddy's 3.0

Guide :: FNaF 4 Minigames and Ending EXPLAINED! - Steam Community

Minigames (FNaF4), Fnafapedia Wikia

Five Nights at Freddy's Theories — FNaF 4: Pre-Night 1 Mini Game