Adding a second auxiliary battery


New member
Hello everyone,

I have a 92 Eurovan full camper with an auxiliary battery.

As I leave this fall for several months in the USA and Mexico, I want to add a second auxiliary battery.

Does anyone has the wiring diagram and how to do that?
Do you have this setup?

I did some research and it seems that I only need to add the second battery in parallel and set the center console for two batteries (dip switch behind the console).

Also, do you have any recommendations for the brand and type of battery to buy?
Do I need a special charger for two batteries?