If you think about it, if you always put the normally positive on (+) you will know which way your turnout will go when first fired up. In other words, be consistent. It may help in troubleshooting down the line. Just a thought, because you guys are right: it doesn’t really matter, it will still work!
Don’t worry bout asking what you may think are stupid questions. If I had a dollar for every stupid question I asked here I’d be a millionaire. If I had a nickel for every friendly, helpful, and oftentimes very insightful answer provided by the folks here to my stupid questions I’d be a billionaire.