The two bosses in the front of the cover are for an angle iron bracket. The angle iron bracket has two mounting holes for the front cover. The two in the back catch a bump out that's welded on the rear(this bump out also has two mounting holes for the rear cover) , it appears from your picture yours doesn't have this part welded on, apparently you have a slightly different version.

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Last edited by Stevo; Mon Dec 17 2018 06:38 PM.