u/Individual_Row6297

https://preview.redd.it/lzyzuaj0zzxg1.png?width=946&format=png&auto=webp&s=afdfa1de89ba8d1e1e3d41bfa5678e36c8c40c80

im confused where I put this in the video Chainsaw Man Helmet Cardboard Tutorial DIY (free template) | chainsaw man cosplay - YouTube, I think its part of the jaw but Im unsure, if anyone spotted something I didn't please tell me.