⬢Take the SHORTER aluminum extrusions and place them next to the frame.
Short extrusions must be placed on the side, where engraved PRUSA logo on the frame (top left) IS NOT VISIBLE.
Note: screws are inserted from the opposite side of the frame. If you need to manipulate with the frame, make sure the extrusions are on the correct side.
⬢Ensure you are using the correct holes, see the second picture. Use the M5x16 screws to connect extrusions to the frame. Tighten the screws just slightly!
⬢Now, tighten the screws fully, but ON A DIAGONAL, see the last picture. As soon as you finish the first, tighten the second pair. Then proceed to the second short extrusion.