Django admin: section in app without creating a model

Question

I need a custom section of application on admin site. It must not consider any model (proxy, unmanaged, etc), without template overriding, just a "phantom" application in programmatic way.
I expect it looking like a bunch of URLs, registered in admin and located in separated section on index page.
Hours of search and other answers without result. I tried this way in existing application, but links didn't appear.
I did

class MyModel(models.Model):
    class Meta:
        managed = False

registered as ModelAdmin, and it's work, and for my luck URL fully matches with my view, so I don't need make real migrations, but I find this approach too rough. I really hope, there is more elegant way, but, perhaps, I must know Django deeply.