Wow, I wouldn't have ever found that. Nice hunting, Cookie.
One thought, once you determine what the basic url is
like ..../product/category&path=81
Then you can see what the id is when you click on the category within the expected place of categories, like this example
from the edit link within categoires:
..../index.php?rt=catalog/category/update&category_id=81
But thanks for posting where to find this.
Lee