Can s90 seats be fitted to S60

[Helpful]

On the rear seats, you should have connector. PIN 5 is the ground and the PIN2 is the folding headrests. 
PIN2 on the LEFT goes to the CEM PIN FL75
PIN2 on the RIGHT goes to the CEM PIN FL76 
Then, you will need to set the 187  HEADRESTS 2nd ROW, FOLDING to 02. Which will give you the virtual button on the car functions page.

@IMAY2023 If it's not too much trouble and you have a minute, could you describe to me what I need to add for the rear seats and how to lay the wire.

I have seats without heating and with mechanical headrests. New seats with heating and electronic folding headrests.

I have read your 4th message many times and I still can't figure it out.

For heating. Is it necessary to lay some kind of wire from the central tunnel (where the heating buttons are) along the cushion and back of the rear seat?

Along the headrests. Did I understand correctly that CEM PIN FL75 and CEM PIN FL76, it is necessary to lay the wire from PIN2 on the connectors of the backrest to the CEM itself, which is on the front panel? Is it possible to somehow replace this and install a beautiful mechanical button on the back of the seat (in my opinion, this is even more convenient than the electronic button on the "TV")?