I am doing my 200 hr maintenance on my L3130HST no mid PTO and all was well until I got to the hydraulic/transmission oil part. The issue is that the manual shows 4 drain plugs. Two "normal" looking plugs and then two plugs towards the rear which I cannot tell from the manual where in the heck they are. My tractor has one plug exactly where the manual shows(second from the front), the front plug is a recessed plug and I still have no idea about the back two. My forum search shows that there is a problem with manual diagram but does not say what the problem is. How many plugs? Where the heck are the back two if the answer is four? Is the recessed plug a drain plug? thanks much.