It's not a speaker connector. That's too large...
I completely forgot I had a scanner here, so I put the parts on the scanner, along with a CD-ROM audio connector for comparison. The wire on the top right came out of the connector on the bottom right. That's the one I'm trying to identify.
All of these were scanned at the same time, so they are all at the same scale. I just cropped out the empty space between.
