Abstract: The assembly includes a casing having two halves defining a chamber there between and a lever shifter movably mounted between the two halves of the casing for pivotal movement, wherein the lever shifter configured for to and fro movement. The assembly has a roller-spring-sleeve unit operatively connected to the lever shifter for controlling the lever shifter. The assembly further has four numbers of snap fit units each comprising a flat spring configures into a U-shaped nylon molded part have been inserted into left and right covers to retain the casing to the panel. The assembly also has a cable assembly mounted on an abutment, wherein the abutment is housed within the casing by a snap fit and coupled to the lever shifter on one end and a control cable connected to the casing through the abutment through a hole in the casing on the other end.