HELP! Cracked Tunnel

After I got back from riding a couple of days ago I was looking my sled over and I noticed a crack in the tunnel :face-icon-small-fro on the right side directly in front of the front suspension mounting bolt. Was wondering what the best way to go about fixing it, without buying a whole new tunnel, would be. Any help would be greatly appreciated. The sled is a 2007 RMK 600 155, was also wondering if the better boards could have caused it to do that.

I think the guy I bought it from hit a tree and had to replace that side A arm. Also does any body have ideas or pictures of supports.