I looked for files where i could use Porta pro speakers on my pico4 but most were made for the quest vr headset. So i took some different models and remixed them to suit my pico4. I also created inserts for the 3.5mm / charger cable that i bought from Amazon Sweden to make a clean installation.

USB C-hörlursadapter och laddning,2 in 1 adapter(svart) : Amazon.se: Elektronik

Duttek USB C-adapter, 90 graders USB C typ C adapter, höger och vänster USB 3.1 typ C hane till hona förlängningsadapter för laptop & surfplatta & mobiltelefon 2-pack : Amazon.se: Elektronik