Were the two red wires taped off inside the motor? As in they didn't look like they were hooked up to anything inside?
That motor is a reverse direction type of motor. It indicates that on the label.
Each black wire probably receives 120 volts. How it is terminated is how it might have been wired previously.
Chicks dig me.....Fish fear me
Getting older, I have developed some special skills. I have the ability to cough, sneeze, fart and pee at the same time.
"If we cannot afford to take care of Veterans, then we should stop making them."
David C. Wilker Jr. USAF (RET)