I agree with 24OZ, although it's also possible that you had a loose wire that contacted the other terminal.
Check the underside of your fender for a scorch mark. That will be your evidence of the contact.
By the way, go ahead and clean and repaint the scorch mark to avoid rust.
It is also IMPERATIVE that you install and use a battery hold down bracket. If you don't at the first bump, ZZZZAAAAAPPPPP!!!
As far as a design flaw, technically yes, although in my book they were anticipating side terminals on the battery, except they wanted the terminals on the short side.
Check the underside of your fender for a scorch mark. That will be your evidence of the contact.
By the way, go ahead and clean and repaint the scorch mark to avoid rust.
It is also IMPERATIVE that you install and use a battery hold down bracket. If you don't at the first bump, ZZZZAAAAAPPPPP!!!
As far as a design flaw, technically yes, although in my book they were anticipating side terminals on the battery, except they wanted the terminals on the short side.
