Leaking Oil From Rear of ATV
 

Hello all,
I am new to the KF but I have a 2000 Kawasaki Prairie 300 4x4 with automatic transmission. I was plowing snow late last night and when I pulled into my shed to head in for the night I noticed some drips of oil. I looked underneath my bike and saw a bunch of oil dripping from a casing on the rear axle. I am not great working mechanically on stuff so I have no idea what is happening. I didn't run over anything or notice anything hit that part of my quad. I was plowing for a little over an hour and a half and was doing a lot of forward, shifting into reverse and then high gear again, and putting the plow up and down with my winch. Nothing out of the ordinary really. Any help would be much appreciated as to what I am looking at, what might the issue be and what I can do to fix it!

Thanks in advance.

I tried to upload some pictures but they wouldn't finish for some reason.