Hopkins 41125 Plug-In Simple Vehicle Wiring Kit T-Connectors provide option of connecting trailer's wiring system into vehicle's wiring system Pre-wired to provide right turn, left turn, taillight, and on some models, the backup function The two-piece modular system allows for a more versatile installation as well as a simple 4 wire flat replacement option if the unit ever becomes damaged Utilizes OEM connectors for exact fit and enhanced weatherproofing Includes dust cover and grease packet to prevent corrosion, along with step-by-step instructions for easy installation