The other side is longer threaded rod that goes thru the sheetmetal below the battery.
@Turbo. Blowing off a rule that is clearly understood by all regional directors as a requirement may not, ah, be the best idea of the week.
I hear what you are saying tho re. it not being in the CCR tho. It’s on my list of rule requests to write up this fall. I don’t have any emotional connection to the rule itself, but since it’s been a requirement for 2-3yrs now, it ought to have found it’s way into the CCR.