To change your light in your trunk to be brighter and clearer.
I added a second light in parallel electrically.
Step 1: Purchase Light
The light should have a socket adapter to fit your car, choose the appropriate socket
Step 2: Solder the Additional Light in Parallel
make sure you test the polarities. LEDs will only work with + - connected correctly.
Step 3: The Final Harness
you have your harness.
Next step is to plug into car and route appropriately.