Ratty: Two big bolts/washers through the boot floor. i chose the middle as when i'm sat in the car with a full tank of fuel the back is even and the front is 100kg heavier on the right, so if i keep the battery in the middle that means the car is still balanced in the rear, and i tried to keep much of the (heavy) wire going down the left side of the car! sad i know but hey!!
Lude-dude: I got them off eBay! they meant to be 24 carat gold coated bollocks but cost me i think a tenner... i ask for another plastic cover.. tbh they are perfect! they look cool and do a good job