parking sensors

[Mcints77]

hi folks just got my passat 1.6 bluemotion B7 3 days ago. i want to fit these as dont want to pay £££ for factory fitted sensors.
http://www.ebay.co.uk/itm/CAR-REVERSING ... 2c5021e795

i have by the looks of it led cluster rear lights?

i need a 12v supply for these to work.

is there any way to tap into the reversing lights in the cluster and if so is it 12v supply to the reversing leds?


any help on how to gain access to these lights would be great as i cant see a way into them from inside the boot.