Pins at the back of 650

[Gloland]

Please what is the purpose of the two metal pins at the back of Lumia 650. Those two pins make a contact to two metal at the cover.

 

[nate0]

Please what is the purpose of the two metal pins at the back of Lumia 650. Those two pins make a contact to two metal at the cover.

I think it's the NFC pad/contacts.