PCIe considered external and bootcamp won't install
So I have mid 2012 MacPro tower with an OWC Mercury Accelsior E2 PCIe SSD inside. I would like to install Windows 7 via Bootcamp on this drive, however when I load up bootcamp I am unable to start the install (the option is shaded out and I am unable to select the install option). I've taken a look on the forums however I have found nothing that can fix this, besides the fact that the PCIe is considered external, and bootcamp won't load to an external drive. How do I fix this?