I know you have the surrounds off but this might help others.
Just slide a credit card in between the lights and the 2 squares section.

Slide it along and the clips will pop

Slide it the other way and the other side will come off. It should now just lift off.

Leaving you this:

This is the section that has just come off. See how it has no clips to break

The light section is exactly the same. Put it in and slide to the side

then the other way

popping off to leave you this.
