Volvo HU-650 to HU-850 upgrade

How to upgrade the base factory stereo (HU-650) to the premium sound (HU-850) in the P2 05-09 S60 05-07 V70 XC70. Along with the HU-850 you will need the factory amp and amp harness. Center speaker is optional as well. Ensure you have a T25 torx bit to dismount the radio from the bezel. I skipped over on how to initially get the entire bezel out from the console as their is already multiple how tos on it. But essentially it involves removing the gear level bezel allowing access to two torx bits below the switch panel. I’ll be upgrading the factory door speakers to aftermarket 6.5” at a later date. *You are responsible for any damage you might cause while attempting this*