I think if you read my first reply I suggested not only disconnect the battery, but also disconnect the neg post of the battery.*
If there was any snark in my comment, it was directed at the person that bragged to somebody that was not sure, that he could change the switch without issues. I have no problem with somebody asking, but IMHO, if you are going to tell how to do it tell don't assume the person asking already has the skillset not to cause a short.
*The reason I say (-) is if the (-) is hooked up, and a wrench gets between frame and (+) post there will be a big arc. Post>wrench>ring>frame can take a finger. And that big arc that close to battery can cause battery to explode.