Cut the lining.
I cut a small slot in the material cover of each cheek pad covering material round the back where it wouldn't be seen and slid the speakers between the material and the cheek pad forward of the strap hole. That way you don't even feel them. I also cut the bracket slightly because there wasn't much room between the shell and the lining edge for the bracket clamp.
The microphone sits nicely in the chin guard above the wind shield.