EShapeoko 1.3 Assembly: Z leadscrew
You need the parts in Pack 8 and the Z motor mount plate from Pack 6, with two holes tapped M5.
Identify the one smaller washer in Pack 8, and set it aside. That's part W5D; the other washers are part W5.
Using the two 8 mm M5 screws (S5-8, shortest in the pack) with one washer each, attach the bearing block to the motor plate.