Where oh where is the front differential fluid fill location?? I found the drain but cannot find the fill plug! The manual shows a plug just in front of the differential vent tube but there is NOT one there on my Mule!

Don't want to drain until I know where/how to fill it. I know it takes very little fluid but how do you get it in the frick'n differential? Been on the lift 2 weeks now!!!

Model = KAF620-E2


Thanks!