Help with the front differential. Fill plug must be welded on…HELP!

Hey guys. I am trying to change the front differential on my RZR. For the life of me, I can’t get the fill plug bolt loose. Obviously I’m turning it counter clock wise or to the left. I have nearly broken two fingers trying to get it to move. Can anyone suggest a way to get this fill plug loosen? I have nearly stripped it out trying.

Please help. Thanks.

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