dog ate sony wh1000mx2, what is this piece?

[Bmr2k19]

hi everyone, 

my dog ate my headset and cut off the wire i show in the picture. the headesets are still working in a decent way playing music, but i am not so sure about the anc. do you guys know what is this piece? 

thanks

[Bmr2k19]

Thanks, I really appreciate it!