NOTE: All levels of the riser are connected using the same method:
Locate the latch and security pin attached to the front legs of the higher riser:
Remove the pin and open latch:
Lift up the lower riser and place the channel in the groove in the lower section of the latch:
Swing the upper portion of the latch over the riser, securing it in the groove. Replace pin to secure latch from opening:
Lift the movable couplings that are attached to the front legs of the higher riser and place it over the tube protruding from the back legs of the lower riser: