You could add IF (or IF/ELSE) conditions at the start of the OS installation and run a file like diskpart or execute a script as part of the IF.
This would use whatever logic you want, e.g. look at the number of installed disks or available drive letters to determine that you have a second local drive available etc and thus install to drive 1 instead of drive 0.
Diskpart can do this or maybe WMIC. I believe WMIC works natively in WinPE. Something like "wmic logicaldisk get caption" would list the available drive letters.
After the various IF interations you'd run the deploy image action based on the return results.