If your looking at the clutches straight on the left side has the starting and 1st gear and the right side has the 2nd gear. The seals should be installed with the metal springy facing inward toward the engine and the lettering facing out. make sure you clean up the hole it sits in and don't put any oil or grease on it before installing. pound it in slowly and evenly with a closely matching sized socket until its flush.
thoroughly degrease the 1st and starting clutch shoes and drums with brake cleaner or similar, and lightly lightly sand the clutch pad material to get off just the darkened shiny outer contact points, maybe hit the inside of the drums aswell. Clean and Degrease everything again and do not lubricate anything in there except the 2 caged needle bearings with a tiny tiny bit of heavy grease.
Best of luck Jawa brother
Shiny glazed starting shoe
sanded and cleaned starting shoe
This is the second gear drum, notice how the seal sits in nicely. the 2nd gear has a seperate spindle that only drips oil when removed, when its all back together it doesnt leak at all. There should be a couple different washers and an O-ring stacked up to be close to flush to the outside that go over the spindle and in the hole. check inside and make sure you have them, if you do try swapping them around, washer o-ring washer, o-ring washer washer etc. [attachment 235967 20201009_132823.jpg (edited)