I haven't replaced a rear shock, but to access the fasterners the lower control arm plastic aero cover and trunk side panels must be removed - not a big deal. Once off you will be able to see the fasterners and determine what tools are required, and the R&I might be possible with the car sitting on the tires if there is enough ground clearance to extract the shocks from the bottom of the rear control arms. The rear shocks are not part of the suspension structure like the front struts. The rear shocks just provide damping forces.

If you have to raise the back end for work clearance or to provide adequate clearance to extract the shocks from below, support the car on the lower control arms to contain the springs, since the shocks have the rebound stops.

The rear lower control arms are the main load bearing member as both the springs and shocks connect to them, so it will support the weight of the car. The other four links provide geomety control and transmit brake and drive thrust to the chassis.

Duke