Remove plastic on handlebars ?

I just purchased a 2013 Grizzly today and it seems like the handlebars are angled a little forward. I would like to move them back toward the rider a little or even put the Rox risers on it but can not figure out how to get the plastic that covers the center of the bars off to see how to work on them. I don’t want to break anything so I hope you guys can tell me how you do it. Thanks.