Here's some info that should help you from the Bentley manual.
Align the lever by arrow marks on the cover.
Torque spec for lever to transmission is 59 ft-lb.
Torque spec Transmission to side panel is 16 ft-lb.
Convertible top link in closed position should be 7.68 inches. To do this you measure the distance from link pivot at drive lever to top of the convertible casket.
Here's a video I found to install for 99 and a video on how to remove it. This video starts after the clamshell and the gear has been installed.
https://www.youtube.com/watch?v=PlX_woJLJGE https://www.youtube.com/watch?v=mkTLoHlhGPY