Each setup is unique. You will have to investigate. You don't need to go crazy with an MPPT charge controller, large gauge wires, and 100W panels. For a battery maintainer just keep it simple.
The easy money is to just use clips and connect directly to the battery posts. Assuming your storage location is secure and you can trust no one will walk off with it.
2020 Rockwood Roo 19
2012 F150 SuperCrew Ecoboost