Mike, i don't have my cam done yet.
think of it as a scroll, place your die holder on the side of the die receiver (angle iron thingie)
Mine will just be a flat plate, the angle iron pierced on the side to receive it.
The picture ain't plate but it was closest to the shape I mean.
I'm not sure the placement of the die lock on top of the plate is a good idea.
For one it would need to be below the bottom die at all times. Looks like something I'd get snagged on, but I'm prone to that sort of thing anyway.
http://home.flash.net/~dwwilson/beautifuliron/blacksmithscroll.jpg