It demonstrates that the fuel pump does at least actually run to some degree.
Also, unhooking the fuel line from the throttle body (to hook up my contraption) was where I was able to visibly see that the throttle body was clogged up and that that the throttle body was the problem, not the pump or the relay or the fuel line.
Necessity is the mother of invention, they say.
Before this, I was able to test the fuel pump relay was getting the correct signals. I watched a troubleshooting video by ScannerDanner on Youtube. He was testing a square relay (mine is oval shaped), the same pins are in both but they are labeled and arranged differently. The only pin that I wasnt able to be sure about was his pin 30, which allows you to send the signal to the fuel pump to run. Because I wasn't sure about that one, I passed on that test because I didnt want to cross the wrong ones.
My notes are attached on testing the relay.