Okay, from what I understand, I could be wrong, but the Freddy suit head is for the old animatronics.
Though.. I'm not sure if the new animatronics WON'T kill you when they come into the room. (I'm pretty sure they will if you have the head on though, since I think they might be trying to dismember the older animatronics.)
Any thoughts..?
Edit: ALSO IT HAS BEEN GREENLIT ON STEAM abandon the office I repeat ABANDON OFFICE