For foreign material with EBAE transcription, the NBA's Interim Manual for Foreign Language Braille Transcribing, 2002 is in effect. Material within that publication on pp. 69-70 covers accented vowel symbols and breathing marks. This means you'll be following Rebecca's response and using the contraction as opposed to the dot 4 (or dot 6) and the vowel. The contractions listed in the Interim Manual and World Braille Usage are the same.