[apb2390]

Adding another $0.02 here, we tend to use either screw terminal lugs or hard crimps. I crimp using a square end punch and a hammer, or a phillips screwdriver in a pinch.

Well-crimped leads don't come loose. I've tested this by hanging a 6-inch length of 6-gauge wire with crimped lugs on the pyramid and hanging 130 lbs (myself) on it. Sat there for about 3 minutes, nothing came loose. Hung some additional weight (somewhere around 220 lbs) on it, still no sign of breakage.