Joomla Articles have data stored in {table: #__content}.

Using Seblod you have a choice of how the fields you create will be available:

With {Padlock: locked (default, in the content & forms area)}, the field will only be available to that particular content type.
With {Padlock: unlocked}, the field will be available to all content types of the same object (ie Article Object or User Object).

For fields created with {Padlock: locked}, the data will be stored in {table: #__cck_store_form_my_content_type_name} (ie jcjuk_cck_store_form_events).
For fields created with {Padlock: unlocked}, the data will be stored in {table: #__cck_store_item_object_name} (ie jcjuk_cck_store_item_content).

(the wording might be a little wrong here!):

In the introtext column of your #__content table is the Seblod link (ie ::cck::59::/cck::)

This value is referencd in {table: #__cck_core}, {id: 59}

This table has important info {
id: same value as introtext value,
cck: content type,
pk: id in #__content table,
storage_location: object type
}

All fields, including the ones you create are in {table: #__cck_core_fields}

Check out the db columns {
storage: you set this in the field config area ie standard, custom, json...,
storage_cck: the content type name ie 'events',
storage_location: the object type ie 'article', 'user',
storage_location: the object type ie 'article', 'user',
storage_table: if the field is '#__cck_store_form_article' then it is available to all artice objects, if the field is '#__cck_store_form_my_content_type' then it is only available to that content type,
storage_field: db column it is stored in
}