The present invention relates to a universal serial bus (USB) connector for use in a base unit in a car kit comprising at least two pairs of shielded connection lines. It further relates to a USB cable for providing a shielded connection between a mobile unit and a car kit adaptor. The USB connector for use in a base unit in a car-kit comprises two twin axial connectors (430) including two inner contacts separated by a dielectric and further adapted to be connected to respective complementary connectors and two pairs of shielded connection lines (104 and 104′). Each pair is connected to a twin axial connector (430). Further, a shielded USB bridge (100) connects the two pairs of connection lines (104 and 104′) to four cable terminations (106) to form a USB line (108). The bridge (100) is mounted in the base unit (400′) with the twin axial connectors (430) located in modified guide gins (441) that extend from the base unit.