Green mysterieus (audio) connectors on Pearl2..?

Hi Experts.

I’am going to build my pearl in a flightcase and my wish is to add some dedicated speakers in the cases. But I’am wondering… are the Green connectors on the back with a little note “input” and “output” audio connectors?
Does somebody know how to use the output ?

Looking forward to all your reactions!

These connectors are not currently being used. They are for future expansion. Unfortunately this wouldn’t be audio though, they are meant at GPIO connectors for connecting lights and buttons.

Those are called phoenix connectors.
It is a standard connector on audio equipment but can be used for anything the manufacturer wants.