Exodus 28:14 shows the chains being attached to the settings; here those same chains are fastened to the ephod's shoulder pieces, completing the assembly.

Exodus 28:7 describes the ephod's shoulder pieces being joined; here those shoulders receive the breastplate chains, linking the two garments.

Exodus 39:4 describes the shoulder pieces of the ephod, detailing the same construction as commanded here—joined at the two edges.

Exodus 39:15 records the actual execution of making the breastplate chains, directly fulfilling the instructions given here.