Yes like Winmag said it is one battery. Just use a piece of wood for a spacer in the battery boxy and you're good to go.

When I did my hunting cart the single option battery wasn't cost effective like it is now. on that buggy i had to get the 48 to 12v reducer for might lights.

This new single battery that i just put in our house cart has a separate port to power 12v accessories from. I haven't messed with hooking anything up to it yet though.

I bought this cord connector to install in the space of the existing one on the cart so you can just plub in an extension cord to charge it.

Cord connector

The main thing to understand when using litiham batteries their lifecycle is based off of charging cycles. You don't want to charge it every day, just when it is needed. The instructions say for optimum life let it get to 20% before charging. Our little stock cart we use around the farm to run to the barns and such will go at least two weeks before it needs charged.