Arcana Coelestia#9896
9896. 'And they shall tie the breastplate from its rings to the rings of the ephod' means the joining to and preservation of everything in heaven by means of the sphere of Divine Good in the outermost parts of the spiritual kingdom. This is clear from the meaning of 'tying' as joining to and preserving, dealt with in the places above where the tying of the breastplate to the ephod has been the subject; from the meaning of 'the breastplate' as a representative sign of all things of heaven, dealt with in 9879, 9887; from the meaning of 'the rings' as a sphere of Divine Good by which the joining together is accomplished, dealt with in 9498, 9501, 9882; and from the meaning of 'the ephod' as Divine Truth in the spiritual kingdom in an outward form, in which inner things terminate, dealt with in 9824, thus the whole outermost part of that kingdom.
Arcana Coelestia#9882
9882.. 'And you shall make on the breastplate two rings of gold' means a sphere of Divine Good, a sphere through which there is a joining to the higher part of heaven. This is clear from the meaning of 'the breastplate' as a representative sign of heaven, dealt with in 9879; and from the meaning of 'two rings of gold' as a sphere of Divine Good, by which a joining together is accomplished, dealt with in 9498, 9501. The reason why it is a joining to the higher part of heaven is that this is what is meant by the requirement for the rings to be on the upper part of the breastplate; for from there the small chains were taken up to the sockets of gold on the shoulder-pieces of the ephod.