When the cans are first made they have a pop rivet in but most people drill them out and put a screw of some sort in as the pop rivet can come loose and fall out after time.
The picture monty shows the 2 baffles out, the left one has a small hole on the under side of the baffle where the screw should go in. Take the screw out (slowly so's not to core the threads) and then as capt says get some pointy nose pilers, take a good grip of the small in pipe that comes out of the baffle and sort of wiggle and pull it out. It takes some tugging it get it out but will come out dont worry.
but be warned with not baffles in it will be
LOUD AS FUSH
