I’m writing a tutorial for newbs (also as a newb) that describes how to play music using an Arduino and CEM-1203 buzzer. The one thing that I need to confirm is how do I plug it in? Right now I have negative plugged into ground, and this was confirmed in IRC chat. I just wanted a second opinion just to be sure. With a buzzer, does it really matter what side plugs into ground? It has worked for me both ways without exploding… so far.

Source: The correct way to plug in a buzzer?