Ok, so what you need to do it swap BOTH the middle and the outside wires. It would actually make more sense to put one connector on upside down, like the one on the motor side.

I replaced mine about a month ago with this and it literally wouldn't turn. I eventually figured it out through trial and error. No need to reverse it, so if you reversed it and it goes the wrong direction, reverse it again lol. The one I got already had the two middle wires crossed, I just needed to cross the two outer ones as well.

Also, here a link for you to calculate the new layer heights. Just scroll down a bit. You should only have to change the leadscrew pitch, which is now 8mm/revolution. My favorite layer heights are 0.12mm and 0.2mm. You'll also see that 400 is the right number of steps per mm. Good luck! If you need anything feel free to PM me.

New z tepper motor. This is the one I got. Redrex 310mm T8x8 Lead Screw Integrated with Nema 17 Stepper Motor 1.5A 40Ncm/57.1 oz.in for Prusa i3 Reprap Corexy DIY 3D Printer kits and CNC Mile Routers https://www.amazon.com/dp/B01DVD87Q6/ref=cm_sw_r_cp_apa_VIuxAb63Q3CXX