What is use of module in require list but not in callback function

I have 2 questions basically. 1.

1. What is use of "abc/component/database/XYZSettings" in below code snippet.It is not being used in callback function.

2. What is happening after ready function. With Base Edit

       <script type="text/javascript">
   require(
       [
           "dijit/registry",
           "dojo/ready",
           "awl/database/BaseEdit",
           "dojo/_base/connect",
           "awl/admin/Subscriptions",
           "abc/component/database/XYZSettings"
       ],
       function(registry, ready, BaseEdit, connect, Subscriptions){
           ready(function(){
               BaseEdit({
                   objId: "Settings",
                   readUrl:'/ui/settings/',
                   updateUrl:'/ui/settings/' ,
                   defaultsUrl:'/ui/elmsettings',
                   creatable:false,
                   deletable:false
   
               });
           });
        }
   );
   </script>