Here's a link you can check for your Shark 24 setup.
This is from the Workshop area on the site -
Here is advice from Ken Deeley [ email@example.com ]:
Take off both ends of the boom and assemble the (below) pictured rig. The only tough part is to cut the hole for the double block exit and the turning wire block at the boom's outer end. Other than that even I a left handed artist managed it.
My advice is get twice as much line as you think you need and only cut the extra off after the boom is back in place and working. Trouble or more questions remember we are only as far away as your Email . You can fasten "a" farther in the boom but for me with fat fingers the one bolt to hold both "A" and "B" right were I could reach them seemed best and you only use a few feet more line .
Caution: when choosing line get one that has as little twist in it as possible for as you can see the whole rig floats inside the boom and If your line choice is not right the line could twist around the other lines and blocks and increase friction when you pull on your outhaul