An electronic device comprising: a device housing having a housing opening at an exterior surface; a receptacle connector having a connector housing that defines a cavity aligned with the housing opening and extending into the device housing, the connector housing including first and second opposing interior sides extending into the device housing and third and fourth opposing interior sides extending between the first and second opposing sides into the device housing; first and second opposing spring retention contacts, the first spring retention contact having a curved contact surface that extends into the cavity from the third interior side and the second spring retention contact having a curved contact surface that extends into the cavity from the fourth interior side; a plurality of receptacle connector contacts disposed in a row between the first and second spring retention contacts, each of the plurality of receptacle connector contacts including a contact surface that is spaced apart from the housing opening by a first distance and that extends into the cavity through an opening in the second interior side, the plurality of receptacle connector contacts including a power contact, a ground contact and at least one signal contact; characterised by first and second connector detect contacts disposed within the cavity on opposite sides of and slightly behind the plurality of receptacle connector contacts and configured to, during a mating event with a corresponding plug connector having a plurality of plug connector contacts, detect when the plug connector is inserted within the cavity prior to the plurality of receptacle connector contacts coming into contact with the plurality of plug connector contacts, each of the first and second connector detect contacts including a contact surface that is spaced apart from the housing opening by a second distance and that extends into the cavity through an opening in the second interior side, wherein the second distance is greater than the first distance. a device housing having a housing opening at an exterior surface; a receptacle connector having a connector housing that defines a cavity aligned with the housing opening and extending into the device housing, the connector housing including first and second opposing interior sides extending into the device housing and third and fourth opposing interior sides extending between the first and second opposing sides into the device housing; first and second opposing spring retention contacts, the first spring retention contact having a curved contact surface that extends into the cavity from the third interior side and the second spring retention contact having a curved contact surface that extends into the cavity from the fourth interior side; a plurality of receptacle connector contacts disposed in a row between the first and second spring retention contacts, each of the plurality of receptacle connector contacts including a contact surface that is spaced apart from the housing opening by a first distance and that extends into the cavity through an opening in the second interior side, the plurality of receptacle connector contacts including a power contact, a ground contact and at least one signal contact; characterised by first and second connector detect contacts disposed within the cavity on opposite sides of and slightly behind the plurality of receptacle connector contacts and configured to, during a mating event with a corresponding plug connector having a plurality of plug connector contacts, detect when the plug connector is inserted within the cavity prior to the plurality of receptacle connector contacts coming into contact with the plurality of plug connector contacts, each of the first and second connector detect contacts including a contact surface that is spaced apart from the housing opening by a second distance and that extends into the cavity through an opening in the second interior side, wherein the second distance is greater than the first distance.