Did you buy the battery from HD, or from a parts house?
With an HD battery, there should be any need for spacers.
With an aftermarket battery, their "Universal" fit, isn't always universal.
Screws should be metric thread. Using small spacers and longr screws, you should be able to mount the cable with little to no effort.
“When the going gets weird, the weird turn professional....” ~ Hunter S. Thompson~
R.I.P. Rubberdown. 1971-2012
2005 E.G. Classic
Baisley Oil spring
Rinehart 3.5" pipes
S&S adj pushrods
3 stickers, adding 5 hp each. I swear......