Buddypress settings for the component "Site Directory" What page is it assingned to?

Please can you tell me how to repair the setting for the site directory. What page does is it assigned tp. I have attached a screen shot which shows the request to repair by assigning a page. The options in the drop down box are already assigned to the other components. Do I create a new page and what is it called. I assume the Sample page option is not correct.