PLz help me with vacuum lines

[oldschools12]

Hey guys i recently swapped a ka24de into my s12 200sx. i have one question

where does the vac line on the elbow on the air intake hook up to?

here is a pic...its the cut hose right under the radiator hose:

http://img392.imageshack.us/img392/6269/intakehosemq0.jpg

thanks for the help