Duel Batteries

[Bigdog]

Just bought a 2014 Yamaha SX192. It came with 2 batteries, which is something new for me. I am wanting to put a charger on them till spring, how can I know if these batteries are in series or are parallel? What is the best way to connect my charger to them?

 

[vxooxv]

About 10 threads down see: https://jetboaters.net/threads/do-you-have-questions-about-battery-chargers-i-am-here-to-help.1534/