如何在Laravel中批量插入不同的连接？

'connections' => [
    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],
    'second_mysql' => [
        'driver' => 'mysql',
        'host' => env('SECOND_DB_HOST', '127.0.0.1'),
        'port' => env('SECOND_DB_PORT', '3306'),
        'database' => env('SECOND_DB_DATABASE', 'forge'),
        'username' => env('SECOND_DB_USERNAME', 'forge'),
        'password' => env('SECOND_DB_PASSWORD', ''),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],
],

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class ModelName extends Model
{
    protected $connection = 'second_mysql';
    // ...
}

$data = [
    ['column1' => 'value1', 'column2' => 'value2'],
    ['column1' => 'value3', 'column2' => 'value4'],
    // ...
];

ModelName::insert($data);