Use M10n nuts (14 pcs) , M10w washers (12 pcs) and M10 threaded rods (2 pcs).
⬢Screw the nuts on and place washers, Y-corners and PSU-Y-part on the threaded rod as shown in the picture.
Ensure 100mm distance between a washer after counter-nut and the Y-axis corner. Use photo as reference.
⬢The 2 nuts have to be tightened against each other (counter-nut).
⬢Note that there is no gap between parts, they have to fit together.
For the initial position of Y-corners, you can temporarily mount the rods (see step 10, 11).