03 Blazer front differential drain plug
 

So I just bought this 03 Blazer 4x4 and want to change all the fluids. From the posts I've been reading here, there is not a drain plug on the front differential. I found the fill plug on the passenger side, but it looks like there is a drain plug on the drivers side. Anyone have any thoughts on this. You can see in the picture what I'm talking about.