XPS 8700, mSATA bypass question

Sorry a little short on specs since my system is down...but basically I have a circa 2013 Core i7 XPS8700 desktop. 24GB Ram, 256GB mSATA with OS, 2TB HDD with most programs and data, upgraded 2GB graphics shipped with Win7 Pro. The onboard mSATA, where the OS is installed recently failed to boot. After booting from the Windows disk and using every method I could find including startup repair and command prompt utilities (rebuild MBR, DISKPART, etc..) I'm ready to move on.

Was going to upgrade and clean install soon anyway. I have the data I need on other external drives and the installed 2TB HDD that should be visible once I get the OS going. Now, I just purchased a new Samsung EVO 860 1TB SSD and a Win 10 USB. Question is, what's the best method to just start over with the new drive and OS. Obviously I'll change the boot order, and set up BIOS...but should I remove the mSATA? Use the Diskpart utility to clean it? It might be handy to look at it to remember a few things to reinstall, but I don't want it to muddy up the works with another disk containing OS and registry entries, even if it can't boot.

My current plan is to just install the SSD in drive bay 2, connect to one of the three remaining SATA ports, boot from USB and install Windows 10 on that drive, then refer to the data drive (currently D) for stuff to reinstall. Of course many programs are on there in the Program Files, but none will be registered with the system, so just planning on installing everything to the new C: drive and copy over data files since I have room now. Thanks in advance for any thoughts/suggestions. .