Sorry for being obtuse but I can't exactly visualize what you mean.
What you suggest sounds about right but where would I cut a notch and how big? How would that help when the metal is already touching at the point where the loop closes and the bolt goes through? I can't see anywhere where cutting it would make it tighter. The style of connector that is on there is the kind with the thin metal ring, not the heavy style bale with a bolt through it.
Mine looks
sort of like this,
Duralast Top Post Battery Terminal DL01045
where the bolt is threaded in as far as possible. The ends of the metal ring between the bolt and nut are already touching. Where could I cut this to make it fit tighter? I thought about wrapping the post in copper wire or something like that but that seems a bit iffy.
LMHmedchem