In order to change between CAM/DIS you can follow these instructions - https://www.balena.io/fin/1.1/docs/developers/#Dual-camera-mode. You need to replace the
dt-blob.bin file in the root directory of the fin, with the one provided in the link, when mounting the boot partition.
You can remove the plastic sticker on top of the switch; the CAM/DSI requires a physical toggling of the switch to set the desired mode. Please ensure that your device is powered off when you do this as performing this action whilst powered on may damage the device.
Let me know if this resolves your question!