Oh! This is a good one. Puzzle that is.
Top one. A line going through the slide and up.
The middle one. A line coming down, going through the slide and down,
The lower one. A line going down, tied off at the slide and down where it ends.
If you pull on the end of the line, it will pull down the slides.
But "why" on a small light sail?
Why not just have a line from on slide to the next?
What are those white cheek blocks for?
Is it rigged correctly?
I don't know!!
gary