Republican "tests" on voting machines

Some Michigan Republicans, including officials, got their hand on some voting machines in Michigan and did various "tests" on them.

I can't be sure what those machines actually do. It turns out that the term "tabulator" is used for all sorts of machines that generate total vote counts. It is possible that voters vote directly on those machines, and the machines output only totals. Using that kind of machine with a computer in it makes the voting system vulnerable. If so, the state should eliminate their use.

However, those vulnerabilities don't spontaneously exploit themselves. They can be exploited by people. The people most likely to rig an election through voting machines, are those who are (1) their manufacturers (because they have opportunity), (2) given to wild conspiracy ideation such as QAnonsense, or (3) willing to break any law for their cause. Each of those three groups is mainly Republican.

I would not put it past those conspirators to have inserted a back door into the machines they got control over. But it could also be the common Republican play, Blow Smoke Then Cry 'Fire'.

Making things even more shocking and dangerous, one of the conspirators is now running for Attorney General of Michigan, endorsed by the corrupter. I'd expect him to quash the investigation if he is elected.

If you find any reliable information on what part of the election these machines actually do, I would appreciate it if you send it to me with its URL.