You don’t connect F360 to Easel.
Check the 2nd post of this thread and follow the tutorial there:
In Fusion360 CAM you specify the F360-easel.cps as your post processor, the you export the tool path for your project => generate a name.nc file. This .nc-file can now be imported by Easel and you can now send that code via Easel to the Xcarve