What I did was get a set of these:

http://batteries.batterymart.com/bat...nal-post--list

I got them from a car parts store like Schucks or Auto Zone

They are threaded to screw onto those terminals on the back of the switch. I just drilled the rest of the way thru the terminal post, tapped it to match, and screwed it onto the back of the switch. This way I didn't need to modify the 2/0 cable and battery clamp that came stock. I had to cut the post down a little as it stuck out too far to mount the switch, but it being lead, it was really easy.

Not sure if that makes sense, but it's a super quick solution!