Great,

first find under the dash, the control box. it looks like the picture (yellow-box)

the only wire what is connected to the wiring of the XJ is the white wire (port 7 ignition) (goes to the fusebox)
The Gray and blue wire (port 2 and 3) goes to the speed sensor.
port 5 (brown-wire) and port 10 (yellow) and port 14 (green) suppose to go to the multifunction lever by the steering wheel.
the 6 other wire goes to the servo (under hood)
from the multifunction lever goes a blue wire to an in-line fuse (pink) and stop light switch.

it is very simple,
if you wish i do have a diagram, only it is an PDF, and i do not know how to upload this.

Thomass