Yes, it's from the days of analog stuff so the polarity is the opposite compared to most accessories you'd want to use today. Thankfully it's pretty easy to do if you know how to solder. You just have to pull the socket out, unsolder the connectors, flip them, and re-solder it. I also took that moment to rotate it so my right angle cables drop down instead of to the side.
I'll let you know what a figure out with it, I may have some time to really take a look at it all this week.