Electric Seats Rover 75

[historicalgasman]

Hi all, I'm hoping somebody can help. I have just purchased a wonderful set on electric seats from a Rover 75. I am looking to fit them into my Land Rover Defender. Now there are 3 plugs underneath, big black one with 4 cables I can see is the power and earth, one of the other plugs blue with yellow wire goes to the seatbelt I suspect this is airbag related, but there is a third plug Yellow with a black wire coming from it, could anybody tell me what this does.
I have also seen mention of a relay in other threads. Neither of my seats have a relay attached, is this something that would be housed in a fuse box and if so where should it appear in the wiring scheme?

I appreciate I am not a 75 owner but I still have a Rover and any help would be greatly appreciated.

Thanks

[steveo]

Hi
One plug is for the airbag and the other is for the
Pre tensioner for seatbelt
Regards
Steve

[historicalgasman]

Cheers, had a good search through the archives this afternoon and found all the wiring info I need! Cant wait to get these seats in they are so comfy compared to defender seats.