Bus Bar - Hmmmmmmm, there was also a weird looking metal bracket down in the battery compartment. 2 pieces of chromed stainless welded perpendicular to each other and bent to almost look like a basket with the ends also bent and holes drilled in these ends almost like they were supposed to attach to something.
and thks - info was very helpful. So it sounds like both reds come off the switch and blacks go to ground. Can I safely jump from ground of 1 battery to the other then to engine ground?
Thanks Cap,n Dave