وَيُجْعَلُ شَعْرُهَا عَلَى صَدْرِهَا
Translation: The woman’s hair is placed upon her chest.
The hair is brought forward over the woman’s chest and covered by the appropriate layers. The more detailed account also describes dividing the hair and placing it forward.
The phrase states the placement of the hair; it does not authorize cutting or styling it.