Help adding another LED to my existing alarm

[Getwild2 10+ year member]

I want to add another blue LED to my alarm, in the middle of the dash, near the headunit. How easy is it to hook one of these up? I can only imagine it would be one or two wires, not quite sure where and how to connect them. Maybe I can just splice into the other LED wire??

Thanks for your suggestions!

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[btnhfan 5,000+ posts]

What are the current leds? Like 4v, 3v, and are there any resistors on them? And is your new led 4v, 3v, etc..