An accessory device for a hearing instrument, the accessory device comprising: a connector tip (120; 902A, 902B; 1004A, 1004B) that comprises: a first wire segment and a second wire segment, wherein: the first and second wire segments are electrically conductive and electrically insulated from each other, the first wire segment has a first contact surface configured to provide a first electrical connection between the first wire segment and a first electrical terminal, and the second wire segment has a second contact surface configured to provide a second electrical connection between the second wire segment and a second electrical terminal; and a first set of bristles and a second set of bristles, wherein: the first and second sets of bristles (122, 124) are electrically conductive, the first set of bristles is electrically connected to the first wire segment and electrically insulated from the second wire segment, the second set of bristles is electrically connected to the second wire segment and electrically insulated from the first wire segment, and the first set of bristles is spaced from the second set of bristles as to prevent a short circuit between the first and second sets of bristles due to bending of a bristle of the first or second sets of bristles; wherein the first wire segment and the second wire segment are helically twisted around a shared axis. a first wire segment and a second wire segment, wherein: the first and second wire segments are electrically conductive and electrically insulated from each other, the first wire segment has a first contact surface configured to provide a first electrical connection between the first wire segment and a first electrical terminal, and the second wire segment has a second contact surface configured to provide a second electrical connection between the second wire segment and a second electrical terminal; and the first and second wire segments are electrically conductive and electrically insulated from each other, the first wire segment has a first contact surface configured to provide a first electrical connection between the first wire segment and a first electrical terminal, and the second wire segment has a second contact surface configured to provide a second electrical connection between the second wire segment and a second electrical terminal; and a first set of bristles and a second set of bristles, wherein: the first and second sets of bristles (122, 124) are electrically conductive, the first set of bristles is electrically connected to the first wire segment and electrically insulated from the second wire segment, the second set of bristles is electrically connected to the second wire segment and electrically insulated from the first wire segment, and the first set of bristles is spaced from the second set of bristles as to prevent a short circuit between the first and second sets of bristles due to bending of a bristle of the first or second sets of bristles; the first and second sets of bristles (122, 124) are electrically conductive, the first set of bristles is electrically connected to the first wire segment and electrically insulated from the second wire segment, the second set of bristles is electrically connected to the second wire segment and electrically insulated from the first wire segment, and the first set of bristles is spaced from the second set of bristles as to prevent a short circuit between the first and second sets of bristles due to bending of a bristle of the first or second sets of bristles; wherein the first wire segment and the second wire segment are helically twisted around a shared axis.