Replaces the standard cylindrical plastic housing; The standard antenna comes with a cylindrical plastic housing (affectionately referred to by many as the “pipe bomb”, due to its looks) with plastic caps on each end. The control cable wires are connected to terminal strips, which are then placed into the plastic housing. The connector junction box is a hinged enclosure that has female terminal headers mounted inside. The control cable and EHU cables are then connected to a male terminal plug, creating a pluggable/unpluggable connection for the antenna wiring. This highly reduces the chance of miswiring during the initial install process. The connector junction box also includes a 25 pin female dsub mounted inside, for testing the antenna at the point of installation. Highly recommended!