Review on Upgrade Your Ford Vehicle's Speaker System with Metra 72-5512 Speaker Harness: Compatible with Select 1989-Up Models by Timothy Hughes

Simple, they plug into the spade connectors on aftermarket speakers and then connect to the factory wiring harness. The right size tabs are a pleasant surprise. You have a big scoop for the positive and a small scoop for the negative. Ideal. No mistakes. This is highly recommended. One issue to be aware of is that the Metra wiring harness increases the wire length compared to the factory wiring harness. This allows a cable loop to be added. Be sure to attach this loop to the speaker and not just stick it in the door. The power window can be pinched or pinched. Before reinstalling the door panel, raise and lower the window and check that everything is clean.