How to pass yii\db\Connection to an ActiveRecord connection?

Question

Yii

There are several databases with the same tables and structure. There are models for user and post tables

class User extends ActiveRecord {
  public static function tableName() {
    return 'user';
  }

  public static function getDb() {
    return Yii::$app->db1;
  }

  public function getPosts() {
    return $this->hasMany(Post::class, ['author_id' => 'id']);
  }
}

class Post extends ActiveRecord {
  public static function tableName() {
    return 'post';
  }

  public static function getDb() {
    return Yii::$app->db1;
  }
}

How to make it so that when receiving data in this way

$user = User::find()->where(['id' => 1])->with('posts')->asArray()->one(Yii::$app->db2);

posts were also requested from db2?