Installing the two 6v Trojan Golf Cart batteries, which are heavy as heck, is a chore at best. I had to put the battery box on the tongue, grab the strap and hook up a battery, hoist it up and over the weight bars adjustment towers and maneuver into the box. After that, do it again.
After hooking up all the loose wires from the solar set up, I flipped the switch and watched as the meter came to life and shortly started showing amps and volts going into my batteries. SUCCESS for sure.