How does the hand clutch control for handicapped drivers work in a LHD car and how is it routed?

A hand operated clutch for disabled drivers is available in two types: 1. Manually operated: The gear shift knob of the vehicle is replaced with a new knob featuring a small lever which controls the movement of the clutch. The driver moves this lever with their fingers while their hand is on the knob in the process of shifting. The lever is analogous to the clutch pedal and the driver has complete control over the clutch. 2. Computer operated: In this case an infrared detector is installed in the existing gear shift knob. By placing their hand on the knob and covering the detector the driver signals the computer their intent to shift and the computer controls motion of the clutch. This type of device requires a great deal of data from the vehicle itself, including speed, engine RPMs, and whether the driver is on the gas or brake. Both types utilize a powerful servo-motor which is usually mounted in the engine compartment. The servo-motor controls a cable (similar to a motorcycle clutch cable, but larger in size) which is connected to the clutch pedal. When used the cable pulls on the clutch pedal simulating the action of foot pressure. Samples of these clutches can be seen at www.rediautosport.com