How are categories and cms_slot_translation related?

Hi, I want tu update a cms_slot_translation.
I have a category_id, but how is the category_id related to the cms_slot_id? I looked at the database relations. But when I follow th category along over the cms tables I finally got a different When I follow the other way from the to the category I got multiple.

How are they really related?
I want to update a cms_slot_translation.config by the category_id.