Wiring questions

When trying to wire up the z axis and x axis I am having a problem getting the white plastic parts to go inside each other. I see from the colors how they are supposed to go together but they won’t go in and I don’t want to risk breaking them. Any insight would be greatly appreciated.

The connector on the stepper motor wire should be keyed so that it only fits into the stepper motor in one direction.

Based on the pictures I’ve seen, it looks like 2 little notches on the edges that act as keys.

If you still need help, post pictures of your setup and cables.

Yes the two notches should have been a dead giveaway. I was trying to match the way they had them in the pictures. Thank you.