Four buttons should be connected to the DASH2 to allow in-vehicle control of many functions and display options. These buttons are required to set certain display functions and options, as described in Programming soft buttons. Momentary push-to-make buttons should be used. These are available from Race Technology or from any good electrical or automotive component supplier. Each button must be wired with one terminal connected to the switch common and the other terminal connected to the relevant DASH2 switch input. The switch common pin and four switch input pins are all included in Connector2, as shown below.