Get the bolts moving with heat , retighten them,or a new pair and then do then a couple of short lengths of weld using 312 dissimilar steels rods either side along the join gap will stop the movement that allows the bolts /holes to wear undo etc.
what it looks like shouldn't be a an issue really as strength and reliability is all.
what it looks like shouldn't be a an issue really as strength and reliability is all.