How do I operate the machine that O'Toole was using?

Hint 1 of 7:

You first need to find a way to turn it on.

Hint 2 of 7:

That involves finding the right part for the machine.

Hint 3 of 7:

It looks like something else you saw a lot of on the Central Plains.

Hint 4 of 7:

It's another one of those plaques.

Hint 5 of 7:

Only this is a "blank plaque."