Where in the Sargauth Level are the paths into Skullport?

In Waterdeep: Dungeon of the Mad Mage and its Maps and Miscellany, there is a map of the Sargauth level and a map of the levels of Skullport.

Skullport’s maps show the five paths in and out: Shadow Pass, Beggar’s Rest Pass, Taglath’s Gap, Steamfall Pass and Whisperhaunt Pass.

However, the Sargauth Level’s maps only shows two paths labelled "To Skullport" how are these paths connected?