Can s90 seats be fitted to S60

[IMAY2023]

Which PINs are you asking about? 
On the controller itself or on the Seat harness to Car's body connector? 

If you are asking about the Seat to Car harness connector.
Driver side connector:  94/505 
Passenger Side connector: 94/506
94/505:16 and 94/506:15>  15/50 CENTRAL JUNCTION BOX connector A30 (fuse number 40, 5amp)
94/506:11 From 7/255 SEAT BELT REMINDER MAT (power) > 4/176 SUPPLEMENTARY RESTRAINT SYSTEM SRS on F6.  (passenger side only) 
94/506:31 From 4/240 OCCUPANT WEIGHT SENSOR OWS  (LIN) > 4/176 SUPPLEMENTARY RESTRAINT SYSTEM SRS on F92.   (passenger side only) 

It looks like your new seats have occupant sensor and seat belt reminder but your old seats do not have. You can ignore them and just do not enable those from Orbit.  
But it just does not make sense. you are missing the main PINs, (CAN BUS, Power, Ground and some other stuff) even from the new seat's connector. 
Have a look the diagram. https://forums.spaycetech.com/attachment.php?aid=334 and search for  94/505:XX  94/506:XX  where XX is the PIN number on the connector.