originall shock was broken

disconnected the power and water supply.

removed the back panel.

unscrewed the contol board that blocked access to the bottom of the shock absorber.

pulled the original pins out with pliers while pressing in the piece that prevents it from working its way out.

removed the shock absorber.

placed the new shock absorber in the bottom mount, put soap on the pin for lubrication and pushed it through the hole. Put the top of the shock absorber in its place and placed the other pin in.

replaced the control board and replaced the rear panel.