The reference image is configured to boot the Camera MUX 2x2 example application, which runs using a 4 CSI2 cameras. If you want different cameras, you must change the configuration.
When you change your hardware configuration, you often must change the order that you start different services and the sensor configuration file. To simplify the changes, the reference image provides multiple SLM configuration files that specify the correct order of services to boot based on the hardware you boot and use predefined sensor configuration files, which is used when the Sensor service starts.
In some cases, you may need to modify the sensor configuration file based on what you want to use with your image. The sensor configuration files are located at (/etc/system/config/) on the reference image. For information about the Sensor service and the sensor configuration file, see the Sensor chapter in the System Services guide for the QNX Platform for ADAS.