Hi Lam,
Welcome to the Adobe Analytics Community!
The 'Other Internal Websites' you are referring to is a Marketing Channel defined in the Marketing Channel Processing Rules. You would have to check the definition of this channel in the Marketing Channel Manager. You would need admin privileges. Here is how you can access it:
Click Analytics > Admin Tools > Report Suites.
On the Report Suite Manager page, select the report suite.
Click Edit Settings > Marketing Channels > Marketing Channel Manager.
Let me know if that helps you.
Tanmay