Disconnecting vehicle battery
 

Well I've had really bad all to luck throughout life with energy, and I don't wish to fail here. I simply need to ensure that I'm carrying this out right. To remove the negative from the battery, it's a'ok to contact the ends with a wrench and perhaps not get surprised to death right? I know that it's an incredibly silly question, but I know that I'm likely to kill myself, if I don't question. Nearly have several times and it's not so entertaining or relaxed.