Creality CR-10 Smart User Manual page 17

For loading filament smoothly, the end of the filament should be placed as shown
above.
When the current temperature reaches the target temperature, the consumables pass
the material breakage detection, and are inserted into the small hole of the extruder
until the position of the nozzle, If the consumables flow out at the nozzle, it means that
the consumables have been loaded. Method of adjusting the tightness of the extrusion
spring: Arrow to right is tightening, arrow to left is loosen. (As shown in figure A)