These relays don't plug in the side of the CEM like older P2 Volvos 2004 and earlier. From 2005+ they're internal soldered to the circuit board. A new CEM is way more than $400, most people would opt to send the one they have away to be rebuilt. There's vehicle specific programming involved so you c...

https://volvornt.harte-hanks.com/manual ... Manual.pdf

Page 195, see footnote (1) "This system is standard on U.S. models and optional on Canadian models"