That is the worst pic, it always comes up. The colors are all switched. I actually can’t tell if it is correct. For example the parallel the easiest one, why are all 4 colors switched and going to different coils? if red went to red and blue to blue of the same coil and you just switch the other motor it illustrates the point easier. I have a few diagrams on here but really the real picture shows how easy it is. My take on parallel, one opposite, https://www.vicious1.com/assembly/wiring-the-steppers/.
Way too easy to screw up. Did you see my picture of the actual harness?