rear speaker, Grand Prix (wiring from rear speaker wire to speaker, 1 required per speaker)... see morerear speaker, Grand Prix (wiring from rear speaker wire to speaker, 1 required per speaker) Use when installing replacement or aftermarket speakers. Made with correct connector for hook-up to current GM replacement speaker and correct connector for connection to original wiring, or cut off connector for hook-up to current GM replacement speaker and solder wires directly to aftermarket speaker.