May as wel keep this in this thread instead of mine. Do you have memory seating in the controls? They will have a green button with a 1 and 2 button next to that.

If you do not have this in the door, then wiring is not too hard. Based on you pics, it looks like you do not. Otherwise this would be a plug an play.

I can help you match up colors or wires to get you were you need to be. If the seat has a memory module, you can probably remove it (and ship to me!!!). You will have to create a few male ends and such (link in other thread about doing swap). But I can get you dialed in with colors and maybe even tell you exactly what wire goes where. The seat itself, if it has memory, will have many plugs. But of each motor plug you will only need two wires. The other three are used for the potentiometer that read the motor position. That resistance reading of the pot tells the brain box where the motor is and were to return to when a memory function is called.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car