so my dad bought a sun tracker party hut and it hasnt been started in 3 years so a little maintenance is necessary , he went to charge the battery and the 2 batteries and selector switch threw him off , so he took the switch and one of the batteries out , could someone please explain this set up and how to use the switch, so i can explain it to him he wont let me work on it because he thinks im gonna fry the power pack and electronics all replies are greatly appreciated
