They made two ⌞more⌟ gold rings and fastened them to the bottom of the shoulder straps on the front of the ephod. This was close to the seam just above the belt of the ephod.
Then they fastened the breastplate by its rings to the rings of the ephod with a violet cord. So the breastplate was attached just above the belt of the ephod and was held in place. They followed the Lord’s instructions to Moses.