WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Vacuum Distribution (2003-04 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Identifying Vacuum Distribution (2005-06 Models)