Just received my SE slip on mufflers and hope to get some help from Andrew to put the on

Just wondering if anyone has installed them as well. I thought the internal 'silencer' part can be taken out...but at the first look at the mufflers I couldn't see how?!? 

Any ideas or experience from someone who has done that before?

Cheers

check this link mate.
www.hdforums.com/forum/dyna-glide-models/113409-se-ii-slip-on-mufflers-baffle-removal.html