docs: add more explanation and link

Author: kenjis

user_guide_src/source/concepts/factories.rst

@@ -58,6 +58,8 @@ to access user records always go through that connection::
 Now any time the ``UserModel`` is loaded from ``Factories`` it will in fact be returning a
 class instance that uses the alternate database connection.
 
+.. _factories-options:
+
 Factories Options
 ==================
 

user_guide_src/source/general/modules.rst

@@ -191,10 +191,12 @@ with the ``new`` command::
 
 Config files are automatically discovered whenever using the **config()** function that is always available.
 
+.. note:: We don't recommend you use the same short classname in modules.
+    Modules that need to override or add to known configurations in **app/Config/** should use :ref:`registrars`.
+
 .. note:: **config()** finds the file in **app/Config/** when there is a class with the same shortname,
     even if you specify a fully qualified class name like ``config(\Acme\Blog\Config\Blog::class)``.
-
-.. note:: Modules that need to override or add to known configurations in **app/Config/** should use :ref:`registrars`.
+    This is because ``Factories``'s the default configuration. See :ref:`factories-options` for more information.
 
 Migrations
 ==========