There are safety margins and then there are folks who insist a 30-ply tire for a wheelbarrow is not optional.
Do a few voltage dropping checks under load. I'm seeing "must do's" that are weirder than whistling in the dark.
This is especially true of parallel connections with automotive style batteries with RV terminals. Look at the CONTACT AREA atop the post, that a ring terminal rests on. It is absurdly small and it is not even aluminum never mind copper. Try lead.
Some of these comments I'm reading are utterly off-the-rails.
True high amp terminals are not post
And certainly not wimpy RV type
They are "L PAD" and that way for a reason.
