In the Owner's Manual that came with my battery
charger it says that when charging a battery
that is not installed to:
"Attach at least a 24", 6ga (AWG) insulated battery
cable to the Neg. battery post, connect the charger to the Pos. post, then connect the charger to the clamp of the free end of the cable attached to the Neg. post."
I'm curious why the need for the additional length of cable on the Neg. post?