Here are two pictures, the first is with the thread around hook #4 (from the threading diagram) before pulling it up into the check spring.
While holding the thread from the top, so you don't pull more off the spool, pull up and over to the right slightly on the thread, it will snap into the triangle on the check spring and then go over the upper hook (obscured by the wire guard in the second photo), then follow the remaining steps in the threading instructions.
I am messaging you separately.