Wheel bearing or CV joint?

My 2012 Griz (1950 miles - all mine) had a pretty significant pop coming from the rear end last week so I jacked it up and found slight movement at the right rear wheel. That also seemed to be where the noise was coming from when I would turn to the right. The left rear wheel didn't have the same "play" in it so I assumed the issue was wheel bearing related. I tore it apart tonight and the bearing seemed very smooth when turning it by had in the knuckle but I knocked it out anyway. I bought new wheel bearings so I might as well put them in. When I disassembled the bearing to use the outer race to drive in the new bearing, there was the tiniest bit of rust inside, quite a bit of grease, and the races had no pits or anything.

I'm just wondering if there is any way to tell if the noise may be coming from the half-shaft before I put it all back together? Anyone have any advice? Do I just put it back together and test ride to see if it's still there? I need to buy an axle nut before I can put it back together anyway as I buggered up the edge pretty bad trying to remove the dimple and now I'm not sure it has enough good material to set the nut. Both boots on the axle are in good shape too.