So Brent got back to me (gotta love the customer service/support at axiom!) and they did indeed put these in there to help brace/stabilize the crossovers (I think that's what he said) during shipping.
I decided to go back in there and yep, found more. I have the m80 millenniums (V2).
Can someone telle where exactly I should put the polyfill in the m80s? On the speaker bed? When I pulled it out I didn't stop to look where I was taking it from. Thanks
Epic 80 system
extra QS8s (to come soon)