Now what is really funny is the #12 Screws to terminate the DC Terminals to. I cannot help but to laugh and wonder where on earth the sucker is going to find wire rated for 1000 amps. Largest wire you can buy is 750 MCM and with 90 degree insulation is good up to 535 amps so you would need to 2 sets in parallel. If you have never seen 750 MCM cable is the diameter of your wrist and wieghs roughly 7-pounds per linear foot. It takes a pipe bender or gorilla to bend it. Just imaging 4 pieces of it at 5-feet long or 20 linear feet weighing in at 140 pounds under a # 12 screw.
I think now you see the issue. To give you an idea of how large 750 MCM cable is below is a picture of it on cable reel. Those reels are 6-foot in diameter and 4-fool in width.