AmazonBasics B00MIBN71I Mode D'emploi page 11

Step 4: Slide the lower arms onto the base. Slide the upper arms over the low arms, then insert
the angled caps into the top of the upper arms. The caps should snap into place.
Note: To remove an angled cap, use a flathead screwdriver to pry off the cap.
Angled
cap
Angled
cap
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