Where is the oriface (for a/c) located on a 1998 Buick Regal?

My friend is replacing my a/c condenser and we need to find where the oriface is located to change that too but we can't find it. Does anyone know where it might be located?Thanks!Where is the oriface (for a/c) located on a 1998 Buick Regal?The orifice is actually an orifice tube and is an internal part inside a metal tube. You really need a repair manual for an exact location.