Chuck, I have attached a few pics, blue circles on the cowl are where there is a blind nut behind which accepts the bolt from behind the first former, I have also circled the bolts for you to see. I use a 2-56 ball driver from inside. There are also a couple 1/8 dowels used to help align the cowl when holding it whilst bolting.

I made a little booboo in that I made a former over the top, this was not necessary and could have been done a different way but I did it from scratch as a first try. You can look at other people's Carden's build pics and see how the hatch could be done without that former running over the top, the hatch will run straight to the cowl.

L