\version "2.18.2"

myFirstEnd = \markup {
  \score {
    <<
      \new StaffGroup <<
        \new Staff { 
          \set Score.repeatCommands = #(list 
             (list 'volta 
               #{ \markup\text\bold\concat { 
                 \hspace #2 
                 "Entweder" \hspace #.1 ":"} #}) 
             'end-repeat)
          R1 R 
          \set Score.repeatCommands = #'((volta #f))
          \bar "|." 
        } 
        \new Staff { R1 R }
        \new Staff { R1 R }
        \new Staff { \clef F R1 R }
        \new GrandStaff <<
          \new Staff { R1 R }
          \new Staff { R1 R  }
        >>
        \new Staff { R1 R }
        \new Staff { \clef F R1 R }
        \new GrandStaff <<
          \new Staff { R1 R }
          \new Staff { R1 R }
        >>
      \new Staff { \clef C R1 R }
      >>
      \new GrandStaff <<
        \new Staff { R1 R }
        \new Staff { R1 R }
      >> 
      \new GrandStaff <<
        \new Staff { \clef F R1 R }
        \new Staff { \clef F R1 R }
      >>
    >>
    \layout {
      line-width = 85
      ragged-right = ##f
    }
  } 
}

mySecondEnd = \markup {
  \score {
    <<
      \new StaffGroup <<
        \new Staff { 
          \set Score.repeatCommands = #(list 
             (list 'volta 
               #{ \markup\text\bold\concat { 
                 \hspace #2 
                 "Oder" \hspace #.1 ":"} #}) 
             'end-repeat)
          R1 R R
          \set Score.repeatCommands = #'((volta #f))
          \bar "|." 
        } 
        \new Staff { R1*3 \bar "|." }
        \new Staff { R1*3 }
        \new Staff { \clef F R1*3 }
        \new GrandStaff <<
          \new Staff { R1*3 }
          \new Staff { R1*3 }
        >>
        \new Staff { R1*3 }
        \new Staff { \clef F R1*3 }
        \new GrandStaff <<
          \new Staff { R1*3 }
          \new Staff { R1*3 }
        >>
      \new Staff { \clef C R1*3 }  
      >>
      \new GrandStaff <<
        \new Staff { R1*3 }
        \new Staff { R1*3 }
      >>  
      \new GrandStaff <<
        \new Staff { \clef F R1*3 }
        \new Staff { \clef F R1*3 }
      >>  
    >>
    \layout {
      indent=0
      line-width = 95
      ragged-right = ##f
    }
  } 
}

\markup {
  \fill-line {
    \myFirstEnd
    \mySecondEnd
  }
}