Adding puddle light circuit

I'd like to add puddle lights to my 2010 dcsb on the same function as the map/dome lights. (Already have the map/dome mod.) So my question is where do I splice into so the puddle lights will work with the map/dome lights? I've seen similar threads with information saying a blue wire in the A-pillar but cannot find said wire.

 

I am also curious to know. What lights are you using for puddle lights?

 

As of right now some 12" led strips I picked up from a friend. I believe they're from Autozone but I don't have any packaging.

 

I ran a wire from dome out to LEDs on side mirrors. Made a plug. Will get pic tonight.

 

Very cool. Thank you for the picture, really pinpointed the wire.

 

They make purpose built lights that are inserted into a hole drilled in the bottom of the door. They are switched with the door open/close switch.
The "puddle" can be a color or logo of your choosing.