Another Foton Question!

On the 60hp and 70hp Foton. I can't believe I'm asking this question but, my rear, (final drive), and my transmission each has a separate oil drain plug, yet I can only find one oil filler and dip stick. The manual does not say there is a separate transmission filler, but shows the drain plug. The manual shows the dip stick and filler for the rear drive, but does not define if the transmission is filled at the same point. If these two units are independent, as to oil reservoirs with separate drains, it makes no sense that they would have one common filler. Anyone have a clue about this situation? Tommy at affordable would know, but I've bugged him before for advice and I don't want to over stress his kindness. Any help would be deeply appreciated. PJ