Hi Mutt,
could not figure out how to add pics in reply to your question, so have done so here.
First is of the body before the wing is on - you can see the 'riv-nuts' where the wing is secured (you're right, the Ali alone will not support the wings)
http://www.usa7s.com/forum/uploads/20070410_073334_clamshell_holes.jpg
next is an exterior shot so you can see the final bolt pattern along the body
http://www.usa7s.com/forum/uploads/20070410_073424_clamshell_bolt_.jpg
finally (hope you can read it!), the 'official' Caterham instructions for fitting clamshells
http://www.usa7s.com/forum/uploads/20070410_073525_wing_fitting_in.jpg
Hope this helps, Steve.