The plastismo requires a forestay with an eye at the end. The forestay in your picture has a stud on the end, threaded into a turnbuckle. The furler is installed wrong. It's catywumpus. I'm guessing that the person who installed that furler didn't want to pay for a new forestay, so they used the old one.
(and, I noticed immediately that there are no cotter pins in that turnbuckle!! the turnbuckle could come undone and the mast could fall.)
With the platismo, you don't need/want a turnbuckle on the forestay. You adjust forestay length by moving the wire eye up or down to different holes in the chainplate, Here's a drawing of the way it's supposed to be done:
Notice that there are clevis pins with cotter pins used to attach the bottom of the furler to the bow stem. For a trailerable boat, I recommend using a retainer ring, and put rigging tape over it to prevent accidentally pulling it out.
Here's a link to the Platismo installation manual
http://www.judybsails.com/v/vspfiles/kn ... eefing.pdf
Hope this clarifies,
Judy B