1. First, login to your Radiojar station and open your Virtual Studio. On the top panel of your studio you will see the Facebook option.
2. Once you click it, a pop up window will appear! Just paste the Facebook media URL of your page (Merge both 'server url' and 'stream key' in a single address), click publish and you are good to go!
Check here if you don't know how to find the media URL of your page!
The preview image of the stream can always get updated through the Virtual Studio. You can upload image with .jpg, .png and .gif format with recommended size 512*512 px.