To Add Custom Source Please Follow Below Steps.

Step 1: Click on Content Option in left menu [Folder Icon] and click on Sources

Step 2: Click on Add New Source

Step 3: Select Website in dropdown box which you want to add Custom Source

Step 4: Select Source Type 

           Step 4a: if you select "Defualt Feeds" you will get list of defualt 2500+ Sources

           Step 4b: if you select "Custom URL" you will be able to add Custom RSS Feed URL

Step 5: Select Category and subcategory 

Step 6: Select Autoupdate if you want data to be captured automatically

Step 7: Save

All the changes made by you will get reflected on website. if you face any issue please let us know.