Close call with the battery!

[400A]

Years ago the aftermarket group 1 battery hold down frames were made of a rugged, red plastic material. I still have a couple. They work nicely the corner style hold downs. I also put a garden hose over the battery cable and the brake rod for extra insurance.
For Optima batteries I use the same one that ModelA29 mentions. That is a very nice and secure hold down.