The M.2 backplane is in the I/O tray that is accessed from the rear of the server.
Remove the M.2 backplane The M.2 backplane is in the I/O tray that is accessed from the rear of the server. After removing the I/O tray and one of the risers to gain access to the M.2 backplane, lift and remove the M.2 backplane from the I/O tray.
Install the M.2 backplane The M.2 backplane is in the I/O tray that is accessed from the rear of the server. After removing the I/O tray and one of the risers to gain access to the M.2 backplane, install the M.2 drives in the backplane; then, insert the backplane in the I/O tray and press it in place.