I have 3 - 12v batteries that I need to set up on a trickle charge for over winter. They are all currently fully charged. I have a Battery Tender 100-240V, 50/60 Hz, 12V - 1.25 Amp.
How do I connect these batteries. A wiring diagram would be nice.
I have never done this before & am worried I will mess up the batteries. My husband passed away in the spring, he always took care of this.