Makey Makey question

Is it plausible to turn your Makey Makey into a voltage measure tool?
I want to use an old turn switch (see added picture) to make something like a mouse controller.
The switch(es) are variable, so I would make a setup that with a different voltage a different control is being activated.
Therefore I need to know which voltage belongs to which state of turn of the switch.

I hope you can help me