Engine bay Fire Wall installation

HI all, i have an aftermarket metal fire wall to put in the engine bay of my Beetle. I have taken the old tar board one out.
Wondering what the best way to fix this in place is?
Obviously the tar board original one has those little fold over meal tabs that hold it in, but this wont work for the metal one.
What have other people done when fitting these?

cheers

flatten the metal tabs and then screw in place top and bottom behind the engine cowling so you wont see the screws. the board has all the tabs so it wont come loose and stop air flow to the engine

with metal fire wall it one piece so wont get sucked to the air inlet

you could add some thick felt in between the fire wall and the body to add some noise suppression.