How to add door opening lights

[20ducks]

I am seriously considering adding the door opening warning lights. I am in an urban area where this would be useful for on-coming traffic. Question is where are the wires to tap into to allow this? Would it be to remove the lighted Mustang door panel? If so, which wires?

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[20ducks]

Looking for a installation guide:
https://www.americanmuscle.com/delta-door-accent-led-light-strip-blue-7918.html