Oh, I have no idea. But generally the machines have to be distributed out from a central depot, and it’s physically impossible to deliver them all at the instant they are needed to the polling places, so for a couple of days beforehand trucks deliver them to secure holding areas. Like schools and churches, mostly, although not all churches are deemed sufficiently trustworthy if you catch my drift. 
But no matter where they’re stored before the election, it’ll be in a place with a conditioned environment, so somebody will have access for maintenance of HVAC, wiring and plumbing emergencies. To me, this is just one of many arguments against using electronic voting machines. Other countries use simpler, more robust methods that don’t have this vulnerability.
If I were a truly morally upstanding citizen with unsullied respect for the democratic process I’d probably be ethically required to take a sledgehammer to those machines, wouldn’t I?
More seriously: I’m not sure I can explain this adequately. Other humans looking bad isn’t in the calculus. I’ve been trusted. Basically, I don’t do volunteer work for organizations or causes I don’t respect, and these have placed trust in me. I can’t justify betraying that trust. So maybe if I could wave a magic wand and flip the election to the Green Party or the Working Families Party, I would, or maybe not, but I simply don’t have to make that decision.
