Favour needed from a coupe owner with heated seats

Ranski very kindly sent me his spare plug with wires this week so I have just had another look in to this. I think I have X1869 figured out (the plug that goes in to the console) and I have also now established that the plugs on the bottom of the 2 seats are X275 and X279. I can find pin diagrams for both in WDS, but I can't find the listing of what all the pins do. Ranski also sent me a spare drivers seat plug he had so I can see where the wires go in to that, but I'm at a loss to the passenger seat without the list of pins. Anybody fancy having a look in case I've missed it?

Also, the diagram suggests I have to run a wire from pin 7 on X1869 to Fuse F16. I can't find where that is either.

Any help appreciated, nearly ready to start pulling it all apart and will make a guide with photos when I do it :)
 
Don't worry, found the pin numbers in this PDF:

http://www.kneb.net/bmw/E46/Heated%20seat%20retrofit.pdf

They are the same for both seats which makes life easier! So I still have 2 questions please:

1) I have to run a wire to fuse F16. I've never added a wire to fuse box before, how do I do this?

2) Both seats require a ground, where's a safe ground to tap in to?
 
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