Vacuum lines on valve cover

[willrev]

Hey, just popped my 300sd hood. The vacuum lines into the black 5 holed input on the valve cover were loose and about to fall out. The one from the temp sensor or water pump was ok. The egr line was ok. But what do those other two lines do and which holes are they suppose to go into since they had fallen out and what problem might be casued if they are loose? Help!