Andrea on Nostr: Dear people with skills and knowledge in electronic music stuff! A while ago, I was ...

Dear people with skills and knowledge in electronic music stuff!
A while ago, I was given a diatonic accordion with one in-built hook-up/connector and a different port that seems to have put in later.
Any ideas what these are called?
The previous owner of the instrument has died and their daughter doesn't know anything about the equipment they might have used.
I'm not planning (for now!) on using the instrument with any kind of amplifier or DAW, I'm just curious.

Boosts welcome 🙂