E53 4.4 2002 heated front seats

[lezmtaylor]

I am trying to work out if my car (comfort seats)has the front heated seats pre installed.
I have removed the passenger seat from the car ( it is the left hand seat on a UK right hand drive vehicle ).
Having removed the seat switch panel and surround I found protruding from the centre rear of the seat squab 2 wires - one blue and one white - which went to a box and reappeared and continued to the mains seat connector block.
I have attached a couple of photos.
Does this mean the seat is prewired for heat and just need a switch and wiring loom to be added.
Hope so as it will save a lot of hassle fitting the retro kit I have purchased.
Also if all it needs is the switch kit does anyone know the relevent part nos, any help with info re fitting would be appreciated.
Regards,
Lez