mate if you have the 2 sheets ( dynamat speaker kit ) then fit the square over the speaker hole and cut out the circle accordingly.... its easy to cut through but sticks like shit on a stick so be careful... i dont have a pic but .. think of a square egg ,,, yolk = speaker in the centre and egg white = dynamat square visible behind it ... lol pretty much how it is pal ... just be careful... once its there you aint getting it off lol ... oh and do it on a warm day ,,, will stick a hell of a lot better
Edit: Fryed Egg by the way haha !