Fitting Parking sensors to a 2002 series 2

Hello,
Just bought myself some parking sensors for my td5, just wondered if anyone has fitted any. The main problem is picking up a feed from the reversing lights. On the circuit diagram it shows an unused spur off the reversing lights. Would be ideal to use this instead of splicing into the loom, Anybody know where it is, before I start raving about.
Any other info/advice would be greatly appreciated.

Regards
RichardG

i did not do them in the end but hope this helps

http://www.landyzone.co.uk/lz/f8/rear-parking-sensors-32745.html?highlight=parking+sensors

just put a double step behind your towball and stop when you hear the crunch.

what more do you need from a reversing sensor???

I am not certain if the right one will be there but there are connectors for tow bar electrics in behind the panels - roughly below the back lights but accessed from inside the car.