parking brake "locking segment"
The design of the hand brake is virtually identical to other models including the 2002. So, it may be that looking at another diagram may be more helpful. Realoem does not appear to be that helpful.
Returning to the issue at hand, from memory, the "hook" attaches over a "locking ratchet". My guess is that the ratchet needs to be rotated. I seem to recall being able to stick my finger into the handle portion that shrouds the ratchet - to accomplish this. Unfortunately, describing the process is more difficult then actually performing the fix. It is very simple.
I know this sounds like I am beating a dead horse, but if you are ham fisted, by removing the center pin and thereby allowing the slack to be removed from the handle, you will likely have enough room to flip the locking lever or at least have a decent idea of what I am describing.
If all else fails, go visit coupe king in Wilmington. From what I understand, he is decent fellow and may just let you look at the handle pieces or offer you some other assistance.