This loose end went untied until FNAF6. Mangle’s FM radio ruined her for audio testing.

“DON’T TOUCH THE TASER, MICHAEL. YOU’LL SCREW SOMETHING UP.”; “BACK OFF, MOM. I HAVE A LICENSE. IF I CAN FIGURE OUT HOW TO JUMPSTART DAD’S CAR, I CAN FIGURE OUT HOW TO WORK YOUR TASER.”; SEVEN MINUTES LATER... “NUH-UH. MANGLE’S ALWAYS LOOKED LIKE THIS.”