I bought these and built wiring harnesses for them. I didn't modify the cars stock wiring in any way. You can purchase stock harness clips from Delphi or you can buy the factory harnesses (I did this). It took me about 60 minutes to take the trunk apart, 30 minutes to remove/reinstall the lights, and 40 minutes to put the trunk back together. I spent about 3 hours mapping out wires and building the harnesses. I will put a complete guide up for anyone interested.