That looks like meant for rigid hull kayaks where the mast needs no stays to hold it up. I
suppose you could attach 3 to the top. Not sure if the oversize rudder can be fitted, but that isn't a
must. Here is what the official i-sail is supposed to look like and be rigged according to pdf guide:
https://media.hobie.com/item_attachments/79052201_79052202_79052203_79052204z52.pdf?_gl=1*x35phf*_ga*MTMzNjg4NDg5NC4xNjQxMzk2NzA5*_ga_Z9H2YY9GHV*MTY5NTc2NDI4OS4xOTguMS4xNjk1NzY0NzYxLjI1LjAuMA.. or sold as
https://www.hobie.com/parts-and-accessories/items/inflatable-series-kayak-sail-kit,2413/That seems to be very obscure/old aftermarket. I have an unused i-sail, but shipping cost would probably be insane.