@aharrison For in the FWIW bucket. The for win10 the panther folders gets searched first for the unattend file first and then on down the line: https://technet.microsoft.com/en-us/library/cc749415(v=ws.10).aspx
MS Recommends that you place the file in the panther folder (either unattend, or panther directly). Then calling out the specific path to it isn’t required. I always do include the specific path out of habit.