Electrical tape. I wrapped the battery tie down in tape and put several strips in the intake itself. The battery covers all this up so you don't see it and you are no longer rubbing metal on metal. I checkl it every once and a while to see if I need to add more take but so far I haven't had too. Then one day when I move my battery to my trunk I won't have to worry about this at all.
Firefly: Mal: You don't know me, son, so let me put this to you plainly: If I ever kill you, you'll be awake. You'll be facing me. And you'll be armed.
