Take the right 2020 mount and attach it to the right Z stepper mount with a M3x10 button head screw and M3 lock washer, On the other side a M3x40 socket head cap screw into a T nut and a M5x8 button head screw into a M5 T nut.

Picture has a M3 socket head screw but I figured out after the fact there could be clearance issues