Tighten the M6x8 set screws.

Be careful while tightening the set screws, extreme force may break the three way hidden corner.

4x T-Slot extrusion 3030 - 448mm

Insert the T-slot Exstrusions in the three way hidden corner as shown.

Tighten the M6x8 set screws.

Ensure the extrusions are flush and square with the hidden three way corner assembly before and after tightening the screws.

Be careful while tightening the set screws, extreme force may break the three way hidden corner.