Air box vac line
 

Could someone please tell me where the inside vac line on the airbox goes to?

The one closest to the edge looks like it goes to something like a pressure regulator on the front, but can't find where the other one plugs into...got a broken coupling piece.

2004 v70 2.4 non-turbo

https://cimg7.ibsrv.net/gimg/volvofo...4acac92e45.jpg