Here's a link to what I did thi spring - it's a Newmar but battery trays are somewhat generic.
https://www.irv2.com/forums/f103/bat...rb-484735.html
I'm assuming this is for house battys not chassis.
How many and what type are in there now?
What are your concerns?
If changing why? and What are you trying to accomplish?
Lots of talk about LiFeO, AGM vs Flooded but no one right answer for everyone or all situations... need a little more info.
Before you do anything be sure to take pics of the existing AND diagram and mark all of the cables / diagram so you know exactly what goes where going back in.