Apparently the Auditors requested the administrative password for the Dominion machines from Maircopa County Officials.
The County Officials said they don't have it.
So who is setting the functions/ settings on the machines. this is the level where the switching functions likely reside...
This appears to be a tailor made case for the use of Ghidra, the NSA software decompiler tool:
https://ghidra-sre.org/
Many lazy coders leave their passwords grouped together in the hex files. I have found admin passwords for several pieces of industrial automation software this way, and I am no code wizard. I think someone skilled at this could unlock the whole thing.