A light emitting diode (LED) lighting system includes a primary enclosure and a secondary enclosure. The primary enclosure can include a fastening feature of a secondary enclosure receiver that is positioned adjacent to an aperture in the primary enclosure. The secondary enclosure can include a corresponding fastening feature that mechanically couples to the fastening feature of the primary enclosure, where the secondary enclosure surrounds the aperture when the secondary enclosure is mechanically coupled to the primary enclosure. The secondary enclosure can further include a passage through which a wire that traverses the aperture in the primary enclosure passes.