quick wiring question

[Tokudai]

Also what happens if u wire them wrong and run them?

your shit wont work.

Not True - a light will work just fine. Some electronic devices may not work or be damaged, but I personally have never found one. The risk of electrical shock from touching an exposed part is (generally) increased by not running them in polarity though. Not worth it, since you know which is which, then wire it up the safe way.