I’m trying to connect to my home’s ground wires. I am a tenant so it’s not my property. 

I see that the outlets here have the hot, neutral, and ground wires - but I’m a little suspicious about how the ground wires are connected to the receptacles (I checked multiple in they’re done in the same way). They’re kind of just tied around a screw on the receptacle. 

Is this bootlegged? Can I still connect my copper wire to the one in the outlet to get the ground current? 

I’ve attached photos. 

[![enter image description here][1]][1]

[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/QAWIS.jpg
  [2]: https://i.sstatic.net/vMFtT.jpg