Bose Surround 700 and OmniJewel Stand Connector has a pin inside where you plug the black & red wire into this insert. The pins fall out on both the standard set up
Bose OmniJewel Floor Stand Pair - White | Nebraska Furniture Mart
Bose Omnijewel Floor Stands - YouTube
Bose OmniJewel Speaker Black Table Stands - 764522-0010