Battery problem? Maybe?

[Richard10002]

They are for terminal clamps, if you want to use them.

 

[PaulRainbow]

Then what are the larger diameter battery posts for? Ornament?
High current, eg. starter motor and windlass, battery posts. Low current, eg. VHF, echo sounder, plotter, etc. stud.

Nonsense. You use one or the other, they both serve the exact same function.