Don't understand exactly where to put Completion lines

[Jay Hamilton, Sound and Silence]

I would like to use the autocompletion in my score 
however when I looked at the manual I got confused as to 
where exactly to put this [copied from manual];
\new Voice \with {
  \remove "Note_heads_engraver"
  \consists "Completion_heads_engraver"
} {
  c2. c8 d4 e f g a b c8 c2 b4 a g16 f4 e d c8. c2
}
~~~~~~~~~~~~~~
in my score [example]

Key = { \key c \major }
SopranoA = \relative c' {
\set Staff.instrument = #"Soprano 1"
\set Staff.midiInstrument = "Accordian"
\clef treble
\cadenzaOn


I'm sure it's simple but like I said I got confused
Jay



--
Childhood is a Journey not a race- Emma Sadinsky aged 8
Jay Hamilton
Sound and Silence
206-328-7694
www.soundand.com