en_tn/exo/28/28.md

so that it might be attached

This can be stated in active form. Alternate translation: "so that they may attach it" (See: rc://en/ta/man/translate/figs-activepassive)

the breastpiece might not become unattached from the ephod

This can be stated in positive form. Alternate translation: "the breastpiece might stay attached to the ephod" (See: rc://en/ta/man/translate/figs-doublenegatives)