Apologies for a naïve question but on a Kubota L3250 what are the two transmission oil inlet plugs for? Am I right in assuming the one on the central console beneath the driving wheel is for the gear box and the one at the back for the hydraulics? Are they entirely separate reservoirs? If so, where do they drain to (I see drain holes near the rear wheels and how do I tell if the level on the hydraulics is correct since I see no gauge or dip stick? Thanks.