Black Latch / Opening Underneath Rear

[BuffaloWings]

A friend of mine noticed a black latch was open underneath the rear of the model 3. Basically underneath the bumper or so. I didn't know what it was. Not sure how it got open. I closed it. I suppose that was the right thing to do. ¯\_(ツ)_/¯

What is it?

Images attached.

Thanks!

 

[BuffaloWings]

Note: The first image shows the location where if you got on the ground and looked underneath, you would see the latch. The second image is the latch itself.

 

[BuffaloWings]

I looked in the owner's manual and could not find it. Anyone have an idea?

 

[P85_DA]

Tow hook ???