I was missing the lower screw in this step. Reinstalling the other screw was difficult. Screw either stripped or (I think) screwdriver 00 is not right for removing this/ifixit screwdriver sucks.
I was not able to really screw any of these screws back in successfully using Ifixit's screwdriver. I did the best that I could and reattached and replacement camera is functional AOK.
Not sure if it is because has been repaired before -- front screen replacement -- or if screws just fragile and screwdriver sucks.
Plan to see if can get replacement screws for inside the device.