Lol, bud, there is no seal that goes behind the clutch basket. The picture you have there is of the clutch basket/trans shaft, not the crankshaft. It shouldn’t be smoking more with more trans fluid, that is not how a 2T works bud. The crank is separate from that of the trans. If your quad started smoking more when you added more trans fluid then your crankshaft seal on the clutch side is done and needs replacing. The seal your looking for will be beneath the two gears to the right of the clutch basket