Hi
The best way of giving this is by dismantling the headband
if you need help with it I can help you step by stem if you want
It’s fairly easy to do it,In Your case you just need to take the silicone headband off and move the white midframe back under then clip it back to the plastic part of the headband
Like I said it’s fairly easy and if you need any help give me a shout
Thanks:-)