Let me see....
From inside (leaving out the parts not in question):
1. shoulder spacer (shoulder/largest diameter out)
2. washer (seems concave/dished, but I could be wrong)
3. large plate with ears... "concave out" as if it was a dinner plate?
From looking at the pictures - any parts need replacing?
2. OK, check both sides visually and on a flat surface to confirm/deny flatness.
This may change assembly order or require replacement.
Otherwise, affirmative on installation orientation.
Large plate with ears looks a bit second hand, wouldn't be a waste to replace it.
But I wouldn't let that stop riding, it's easy enough to replace during a lull in the season (?)
Not many folks run slippers here on the street, so I see them very infrequently, and mostly with broken spider springs.
I'd start with a stack height such that you get a 1mm gap between the pressure plate and the movable hub.
IME they need frequent fiddling to keep the stack height/gap under enough control to achieve consistent operation.