In FNAF 3, I think the mask ending happens after the fire ending. Why do I think this? Scraptrap. He makes no sense, if we go off RyeToast's theory, Springtrap used parts from Golden Freddy to turn himself into Scraptrap. Well how does this lead to the mask ending happening after the fire ending? I think Scott wasn't expecting the franchise to go this far, because I can't think of any other reason for Golden Freddy's two eyes to be lit. I think Golden Freddy has two spirits inside of him. Cassidy and Unidentified Child 5, for the remainder of this I will call them UC5 for convenience. Anyway UC5 is not Cassidy, Cassidy is The Crying Child. It's the only thing that makes sense, considering the log book. With Charlie and Cassidy talking to another, I think this makes sense. I believe UC5 is just that UC5, I don't believe UC5 could be The Vengeful Spirit. I believe Mike is The Vengeful Spirit. But back to the point. Golden Freddy has two spirits inside, Cassidy and UC5 I believe the log book is Charlie and Cassidy talking to one another. And when Springtrap used parts of Golden Freddy, the spirits (Cassidy and Charlie) were forced into Scraptrap. I believe Charlie found Lefty and moved into him, leaving Cassidy behind. I don't believe Charlie did this on purpose it was probably by accident, considering Duel process theory's timeline. Charlie put the remains of Cassidy into FNAF world, meaning Scraptrap would likely be in there too. But I don't think that. Because Scraptrap has to be in UCN, not stuck in a random arcade game. Plus if he was in there the timeline would be broken. But back to my main point. How on earth do I think the mask ending happens after the fire ending? If Cassidy wasn't freed, why are both lights out? Scraptrap took the Golden Freddy mask, and then we see the masks after he took the Golden Freddy mask. At this point it's the most logical option, because in Duel Process Theory's timeline. Cassidy gets put into the FNAF 4 box, never to be freed, Because he can't be freed. Souls in FNAF are confusing, but I'll try my best to explain them. If you were killed like one of the MCI your soul and body are stuck in the animatronic you were stuffed into, but can be freed if the animatronic is burned down, and you have your happiest day. But if you're put inside a springlock suit, and the springlocks happen to go off. You're dead. But if someone was to take your mangled body out of the suit, you could never be freed, unless you find your body. That's a very simple explanation of souls in FNAF. And that is what happened to Cassidy, he died. And the worst past is, Cassidy could have survived, he was on his way to recovery, and William had to mess everything up, and kill his own son, he was his way to recovery and William had to kill him. So he could have an alibi, and get Henry sent to jail, because no one would ever think someone could be so messed up. To kill their own son.

Anyway, the mask ending. It one hundred percent happens after the fire ending. Because Golden Freddy's eyes aren't unlit. His entire mask is just gone. Springtrap took the mask. At this point I believe this is the last thing that makes sense.

Thank you for reading. :)