Board Thread:Naruto Discussions/@comment-24120130-20140725123237/@comment-3568954-20140826105644

MangekyoSasuke wrote: No, they're not from ryuchi cave, snakes are. Its where Orochimaru discovered how to obtain jugo's power (senjutsu).

i said they live near it. that is kind of an assumption because Kabuto states that the source of there power is the Ryuchi cave.

http://naruto.wikia.com/wiki/Ry%C5%ABchi_Cave

it clearly states there that Ryuchi cave is the source of there power. it doesn't explain what connection they have but it is likely that they live near it or maybe the snakes of the cave have an allegiance to jugo's clan but what ever it is the source of there power is Ryuchi cave