SE/30 Reloaded no sound

[iantm]

I did not complete this reloaded board myself, and it works and boot but I’m not able to get sound From the speaker. Tried in multiple machines.

Then I noticed these contacts on the back weren’t connected.

A) are they supposed to have something connected?
B) are these parts I could salvage from a different board? (An SE board, maybe? I don’t have a spare SE/30)