Metra 72-5602 Speaker Wiring Harness For select 2011-up Ford and Mazda vehicles. These harnesses allow you to plug your new speakers into the factory connectors present in your vehicles speaker openings. This harness allows you to retain the midrange and tweeters; both speakers can also be wired together. Note: Some aftermarket speakers have terminals that are wider than this harnesss slide-on connectors. You may need to widen the harnesss female slide-on connectors, or use the slide terminals that may be included with the speakers. If you need to connect your new speakers connectors to the harness, soldering is best, and crimping is also very popular.