Those are generated in the .android folder automatically when ADB server starts on your machine for the first time.
From what I can gather, his script Authorizes your Key with the Controller... but I can't figure out how it does it (this is what I'm looking at now)
If I can figure out how to get Debug-level access to invoke ADB commands (specifically adb reboot bootloader and adb push) then I can push the modified ELF and .SO files to the filesystem and replace the existing... which (in theory) should be all that's needed to force FCC mode.