The shock absorber has arrived. I saw the "brief instruction" accompanying with the bilstein shock absorber saying:

"All rubber-mounted strut/damper attachments must not be fully tightened until AFTER the suspension system is loaded (wheels on the ground). Other mounting fasteners (for example brackets) must be securely tightened BEFORE load is placed on the suspension system."

Which fastner has to be fully tightened only after the suspension system is loaded? Is it the one at the top of the shock mounting inside the trunk? In other words, the suspension system should be loaded when I remove that fastener when removing the old shock?

Also, I found the new shock is quite stiff that quite difficult for me to compress it to shorten the length. Any better way to get the new shock into the place? I am afraid I need to compress it a lots to fit the new shock into the mounting place.