Hello XXXXXXXXX, Usually you use a small screwdriver and insert it under the metal clip at the opposite side of the ball. When you twist the screwdriver up, the clip slide up out of the strut a little, but it's enough to release it from the ball. The new struts will come with the clip also.
Your JA Expert,
Ivan
ASE Technician
ASE Tech w/ 18 years in the field. Self employed for 9 years. Member of AUTOLAB radio show.