Can s90 seats be fitted to S60

[matthiasandrzejak945@msn.com]

Warm greetings from Germany to everyone.

I would like to retrofit comfort seats that feature ventilation, massage, and memory functions.
Since I am completely unskilled at reading wiring diagrams, I have a question:

Regarding the connectors on the seats I purchased:

At the connections for the thick cables on the seat itself:
Pin 1: Blue/White

Pin 2: Brown/Yellow

Pin 3: Red/White

Pin 6: Black

The wire for Pin 2—the brown/yellow one—is missing from the floor connector. Can anyone tell me what this wire is for and where I can find it in the vehicle to connect it to the floor connector?

I look forward to your replies and thank you in advance.

I hope Google translated this correctly.

Matthias