An electrical connector including a holding device, that has a recess and at least one conductive pad disposed therein, and a socket that has at least one conductive pin configured to engage at least one of the conductive pads when the socket is inserted into the holding device and a port configured to receive an interface of an external device. The shape of the socket is complementary to the shape of the recess. A first retaining element included in the holding device and a second retaining element included in the socket are together releasably maintain interconnection between the holding device and the socket.