Differential fill plug location

Looking for the differential fill plug on my 05 GEM, would anyone have an idea or picture. I see a plug just below the motor but this looks like the vent valve? I understand that the oil has to be suctioned from this hole but want to make sure I have the correct one. Factory manual is of no help. Thanks

Did you ever find the location of the fill plug. I have a 05 gem as well and am looking for the same thing

It’s the rubber plug in the black sheet metal cover in the bottom of the gear box