You can if you can get it in there. Existing spinner? Not going to happen. If you get a 2.5 Inch SATAIII SSD and remove the outer casing you can get them to fit and devise your own mounting. ASUS played a cruel joke by putting the SATA III connector in the same bay as the M2, the other side is SATA II, makes no sense and then the optical drive is SATA I.
Lots of ideas in that thread from duct tape to thermal pads. Maybe you can devise a better method and add it in with the others for future prosperity.
“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein