After you have attached the storage drive and let the machine find it, then turn the machine off and add your DVD drive. That way your drives will be labeled C: for the SSD, D: for the storage drive and E: for the DVD.
My CAD workstation was custom built. Its DVD is D: and its storage drive is E:. This works fine but it bugs me everytime I see it.
^ very simple solution, go to disk managment and change drive letters. In your case set the DVD to like F, or G. then change HDD to D, then Change the dvd back to E, or just leave it as F, or G. Windows will squell, just ignore warning.