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.
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)
If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!