How to open protos ear cups

[Mwelander]

Hi,
I'm trying to install a Sena communication set in a pfanner protos helmet, and I've found several good videos on how to go about it. None of the videos actually show you how to go about opening up the ear cups though.
I'm afraid I will break them if I just pry them apart, could anyone advise me on how best to open them?

 

[Yimboob]

Pry it apart with your hand on the inside of the soft part. Should come off with about 20lbs of force max.