how to wire leds into interior?

[CalNeedham3061.4]

I just brought some red leds from halforda for £7.99,just wanted to try them out in my interior, if there to chavy there gone, but think they look pretty cool shining on footpedals and similar places, but its just a standard 12v black and red wires with a led at the end? Where and what and how do I wire these up ? I thought they were a plug into the cig lighter, but there not :|