No room for second battery

There is a place for 2 batteries on the tongue of my tt, but I decided to move them close to the breaker panel/converter in order to have a short wire between the batteries and a dc to ac inverter. I built a frame out of steel angle and mounted between the trailer frame and skirting just below the kitchen. It holds 2 agm batteries on their sides. I plan to use the area left on the tongue to store wheel chocks, etc just need to build a floor for it.
This solution is more permanent so would not work for the op, just wanted to share how I did it