different-connection-db_query.php

<?php

//Defining a connection in Query Builder
$data = DB::connection('mysql_second')
        ->table('table_name')
        ->select('col_1')
        ->get();

//Defining a connection within the Schema Builder.
Schema::connection('mysql_second')->create('table_name', function($table) {
    $table->increments('id');
});