Need help on batteries...

So I find myself in a situation. I recently learned from someone here that GBFans.com is no longer selling the battery packs. However, they suggested I google search for TalentCell 12V batteries. Can someone explain to me how one of those batteries would connect to the main board? I didn’t see an outlet that fits the connector the battery has for the board so I can only imagine I have to do some wiring?

It was very simple, as far as I remember… I think you just have to cut the barrel plug off the end of the cable that comes with the battery pack, and strip the two wires to connect to the screw terminals on the sound board.