Yep the switch is called a transversal discombobulator switch, all carbie cars have one of these switches since 1957 when a professor named Dr Funk invented it accidently when he was looking for a way to improve quality of life by using more asbestos products in childrens toys.
most times u will find this switch sticking upright in the center of the cusion in the drivers seat. To engage it you frimly insert the switch handle into your anus and clench your sphincter in the direction you desire to engage. Then vise versa to disengage.