Jack, there are basically two styles I have seen. One has a metal spring clip that holds the strut to the ball bracket. On this one you simple insert a flat screw driver in-between the metal spring clip and the body of the strut; prying the spring clip away only slightly and pulling the strut away from the bracket. Do this on both ends. There is no need to remove the brackets. If your cargo door has a limiter under a slide out and when removed the door can be raised higher, you will need to retract the room and remove the limiter on the door prior to removing and installing a strut.
The other is a plastic retainer cap that can be pried slightly out of the body of the strut to allow the ball of the bracket to easily slide out of the strut. Again a small straight screwdriver can be inserted in the seam to pry it open. Good luck and keep us posted.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7