A shuttle assembly configured to connect an insulated wire to a contact terminal, the shuttle assembly comprising: a connecting insert defining an exposed wire-crimping chamber, wherein the connecting insert is configured to receive an exposed end of a conductive wire of the insulated wire, and wherein the connecting insert is configured to be crimped to the exposed end of the conductive wire; and a seal member connected to the connecting insert, wherein the seal member is configured to be crimped to an insulating cover of the insulated wire, characterized in that the connecting insert comprises a wire-connection confirmation lever that is positioned within a channel formed through a portion of a main body of the connecting insert, the wire-connection confirmation lever comprising: a flexible root that flexibly connects to the main body; an inwardly-canted beam that connects to the flexible root, wherein the inwardly-canted beam extends into the exposed wire-crimping chamber toward a longitudinal axis; and a linear extension beam that connects to the inwardly-canted beam, wherein the linear extension beam outwardly angles away from the longitudinal axis, wherein the linear extension beam is flush or below an outer wall portion of the main body when the insulated wire is properly connected to the connecting insert, and wherein at least a portion of the linear extension beam outwardly extends beyond the outer wall portion of the main body when the insulated wire is improperly connected to the connecting insert. a connecting insert defining an exposed wire-crimping chamber, wherein the connecting insert is configured to receive an exposed end of a conductive wire of the insulated wire, and wherein the connecting insert is configured to be crimped to the exposed end of the conductive wire; and a seal member connected to the connecting insert, wherein the seal member is configured to be crimped to an insulating cover of the insulated wire, characterized in that the connecting insert comprises a wire-connection confirmation lever that is positioned within a channel formed through a portion of a main body of the connecting insert, the wire-connection confirmation lever comprising: a flexible root that flexibly connects to the main body; an inwardly-canted beam that connects to the flexible root, wherein the inwardly-canted beam extends into the exposed wire-crimping chamber toward a longitudinal axis; and a linear extension beam that connects to the inwardly-canted beam, wherein the linear extension beam outwardly angles away from the longitudinal axis, wherein the linear extension beam is flush or below an outer wall portion of the main body when the insulated wire is properly connected to the connecting insert, and wherein at least a portion of the linear extension beam outwardly extends beyond the outer wall portion of the main body when the insulated wire is improperly connected to the connecting insert. a flexible root that flexibly connects to the main body; an inwardly-canted beam that connects to the flexible root, wherein the inwardly-canted beam extends into the exposed wire-crimping chamber toward a longitudinal axis; and a linear extension beam that connects to the inwardly-canted beam, wherein the linear extension beam outwardly angles away from the longitudinal axis, wherein the linear extension beam is flush or below an outer wall portion of the main body when the insulated wire is properly connected to the connecting insert, and wherein at least a portion of the linear extension beam outwardly extends beyond the outer wall portion of the main body when the insulated wire is improperly connected to the connecting insert.