Those parts all require an existing pre-molded threaded location as shown here. You can not use them in un-assigned locations.

I would use a pair of stainless padeyes like the ones securing the bow and stern handles (PN 71220001), through bolted with flat washers and Nyloc nuts. They have all kinds of useful applications. Here's an example:

The Hobie 1/4" shock cord holds its shape relatively well (you can buy it by the foot (RS014BLK). This works great with the snap hook or shock cord fastener PN # 2101. Once you get the hang of threading it, it is length adjustable and of course weatherproof. I make these up for furled sail holders, cart holders and seat holders, etc. The pic on the right below shows the threading sequence. To shorten the cord, just loosen and pull more through the fitting.

They'll snap right on the padeyes and stay in position until you snap them off. Great problem solvers!
