Hi Chris...haven't seen you since the 968 Celebration in Great Falls, Va in 2005, and not on this forum in ages. Hope all is well where you are. If this doesn't make sense, PM me and I'll send you me # and I'll talk you through it.
As far as I can tell, the hook at the end of the elastics hook onto the seat back hinges.
Usually, I poke the large legs into the side plugs
Hook the straps behind the hinges (make sure they are out of the way enough to put the seat backs in place)
tighten the big legs up until it holds together
Put the seat backs into place
put the little legs in the crack left by the the seat backs
Tighten the large legs
I have no idea if I'm 100% correct, but it seems to work...
Worst instructions ever from Porsche....
Best of Luck,
Jay