Hi Cozzie! Thank you for for your feedback! :)
Since these are just rotated squares you'll always have the corners go "outside". Looking at your screenshot I think you can solve the issues by reducing the cable thickness, or maybe adding a 2D mask component on top to cut the unwanted corners.
If you meant that you need all the pixels perfectly aligned (all horizontal) unfortunately this is not possible, but this is a great advice for future improvements.
Hope this helps!