PMFJI... I found a photo online that may help (see arrow).
Just inside the left fender, where the L-N-H lever protrudes is a rectangular cutout in the seat base panel. Look down in the cutout and you will see a loop handle on top a thin dipstick. It is very difficult to get to as you must reach your hand down into the hole to grab the handle. The bottom edge of the plastic is a bit sharp so you have to be careful not to cut your hand. Once you know where to look, it is also visible from the rear of the tractor if you look straight in along side the fender.
I hope this helps.
Just inside the left fender, where the L-N-H lever protrudes is a rectangular cutout in the seat base panel. Look down in the cutout and you will see a loop handle on top a thin dipstick. It is very difficult to get to as you must reach your hand down into the hole to grab the handle. The bottom edge of the plastic is a bit sharp so you have to be careful not to cut your hand. Once you know where to look, it is also visible from the rear of the tractor if you look straight in along side the fender.
I hope this helps.