You have a $7000+ computer and can't "acess the second harddrive"?
Is it in the case? Is it plugged into power? Is it plugged into the motherboard?
Have you partitioned and/or formatted this drive? Does the disk appear in my computer? Does the disk appear in device manager? Does the disk appear in Disk Management?
What are you trying to install? During the install do you have the option to change the install path?