The wonders of a factory service manual.
If you mean the front, you have to install the top over the top tube, drop the lower control arm as low as possible (almost vertical) and then get a friend to help you compress the spring and push it over the lower CA tube.
I didn't have a friend so I sat on the ground and used both feet to push the spring. It rose up over the lower tube/cone and into place.
Now once there, it wants to pop out so have a jack ready to lift the control arm from across the street. Ok, a bit melodramatic.
When you start lifting the arm the spring will compress. Connect the bottom ball joint and then the top.
If it's the rears it's normal strut technique.
Terry
Terry