[-J.,R, & G]

Hi shadowman & everyone,
If I charge two batteries at a time with a regular charger, how do I hook the charger up exactly? I may just being overly cautious &/or have silly or stupid questions, but I sure do not want to chance hurting the batteries or anything else for that matter. The regular charger I have has both a 12V 10 amp charge and a 6V 10 amp charge. Should I just unhook the cables from the batteries and charge one at a time on the 6V setting?