(Navimow X3)How to replace the Navimow Trimmer spool?

Remove the bottom cap of the Navimow Trimmer.
Remove the old spool and discard any remaining line.
Place the new spool back into the Navimow Trimmer head, pull the line ends through the holes, and snap the cap back on.
Press the button on the Navimow Trimmer to release the trimming line.