K1C does not come with a Lidar only the K1 Max does. If you want to use this you will need to order it from Aliexpres since Creality doesn’t sell it on their website for some reason. Then you will need to wire it in, there is a lidar port on the mainboard, you have to run a wire from the mainboard to the plug labeled Lidar Ext on the print headboard. Once you have that wired in you will see a port on the left side of the printhead that’s in between the two boards and you plug the lidar into that port. You can find it for around 40-60 dollars on Aliexpress.