it's someone else's diagram, not mine. and i'm ignoring those 2 items but want to use the button/light/buzzer/switch functionality of the project
Then perhaps you appreciate the problem.
That diagram is an awful place to start. Google "arduino buzzer" (and similar for switches & LEDs) for many, many other, more clear examples. It helps to click on "images" then look for a clear diagram. Here is an example (which, by the way, shows you that Fritzing can be used to produce a reasonable schematic diagram).
By the way: avoid Instructables. Most of them are crap, produced by people who don't know what they are doing, and some can even lead to the destruction of your Arduino.