An adapter comprising: a medical connector for fluid flow comprising a first fitting arranged at a first end of the connector and a second fitting arranged at a second end of the connector, the first fitting configured to accept a first coupling and the second fitting configured to accept a second coupling, the second coupling being different from the first coupling, the connector further comprising one or more pins; a shroud having a first end and a second end, the shroud further comprising one or more longitudinal channels slidably coupled to the one or more pins; and at least one wing pivotably connected to the connector and configured to be closeable around the first fitting and the first coupling, the wing and the connector movable within the shroud by way of the one or more pins of the connector slidably moving within the one or more channels of the shroud, from the first end of the shroud toward the second end of the shroud, such that the shroud can be moved from an unlocked position where the second fitting and second coupling are substantially enclosed within the shroud and the at least one wing is free to pivot relative to the connector from a closed state to an open state, to a locked position in which the first fitting and the first coupling are substantially enclosed within the shroud, retaining the at least one wing in the closed state thereby preventing access to the first fitting, and the second fitting is at least partially exposed at the second end of the shroud; such that in the unlocked position the second fitting is inaccessible and in the locked position the first fitting is inaccessible; whereby in the unlocked position the adapter is accessible only to the first coupling and in the locked position the adapter is accessible only to the second coupling. a medical connector for fluid flow comprising a first fitting arranged at a first end of the connector and a second fitting arranged at a second end of the connector, the first fitting configured to accept a first coupling and the second fitting configured to accept a second coupling, the second coupling being different from the first coupling, the connector further comprising one or more pins; a shroud having a first end and a second end, the shroud further comprising one or more longitudinal channels slidably coupled to the one or more pins; and at least one wing pivotably connected to the connector and configured to be closeable around the first fitting and the first coupling, the wing and the connector movable within the shroud by way of the one or more pins of the connector slidably moving within the one or more channels of the shroud, from the first end of the shroud toward the second end of the shroud, such that the shroud can be moved from an unlocked position where the second fitting and second coupling are substantially enclosed within the shroud and the at least one wing is free to pivot relative to the connector from a closed state to an open state, to a locked position in which the first fitting and the first coupling are substantially enclosed within the shroud, retaining the at least one wing in the closed state thereby preventing access to the first fitting, and the second fitting is at least partially exposed at the second end of the shroud; such that in the unlocked position the second fitting is inaccessible and in the locked position the first fitting is inaccessible; whereby in the unlocked position the adapter is accessible only to the first coupling and in the locked position the adapter is accessible only to the second coupling.