KEYES ROSTOK Manual And Manual page 22

4pcs Plastic Column
4pcs M3*20 screw
4pcs M3 nut
Install as following pic 24 shows: Install 4988 drive board onto 3D V1.2 main control board.
Please make sure 4988 drive is installed in correct direction, otherwise, it may be
burned down.
Install as following pic 25 shows: Install mainboard onto bottom bracket fixed plate. Add
plastic column between 3D V1.2 and bottom bracket fixed plate, then screw it down.
20