I have a TL2100 and am having a hard time finding the transmission fill point. From what I understand, there's supposed to be a vent in the middle behind the shifter, that can be removed and filled from there. I don't have a vent, rather a block with a 90deg fitting to the hydraulic controls. The dipstick tube is super small so it seems unlikely that I can feed 32L of oil through there. Anyone have experience with this?