The Solar Ports aren't batteries. Those are the solar panel junction boxes. Goal Zero typically uses 8mm (DC7909) barrel plugs as output from their panels. They plug into the charging input port on their power stations. Jackery, Bluetti, Rockpals etc. also use that same plug and port combo. The Nomad panels usually also have a USB output port that allows you to plug one of their small USB power banks or your phone charging cable into it.
You really need to buy a battery or power unit. station if you want to use the solar panels. Those look like very small wattage panels with the Boulder (30?) being the largest you have. They'd only be useful with a very small power station or power bank.