I am sorry, but is that little thing (the hook) supposed to tow the GT3?

I am using my X5 to tow my GT3 Cup car on a open aluminum trailer and I have to tell you, my hook is very different and much more "solid" looking. It slided in and locks into place.

I know BMW does not have a brake controller, but I only tow like 4000 lbs so I am ok with not having one; but where is the plug for the trailer lights?