Ipad Pro has three little holes on the left side. They don't seem to do anything. What are they?

[iMore Question]

They are half-way down the left side. They don't press.

 

[Just_Me_D]

Ipad Pro has three little holes on the left side. They don't seem to do anyt...

Those "three little holes" make up the smart connector. It is where you would attach Apple's Smart Keyboard.