Rebuilding rear master cylinder

Hey guys...the build continues over here and yet another road block. I’m rebuilding my rear master cylinder but can’t find a good spec sheet and or photos (prefered) of how this damb thing goes back together. When I took apart I sadly did not take enough notes or photos. Hoping someone can ahead some light. Main confusion is order and orientation of each part. I have included some photos for ease of part identification.

Mainly confused of position and orientation of plastic circular disk that goes in reservoir and the direction and position of rubber cup that goes internally along with spring.

Any help would be great

Spring in first, big end first. Then primary cup open end in first. Then piston. I’m almost 100% sure the white disc is facing correct in your picture and looking at its top. Cup on MC, metal disc,screws threw metal disc, then the plastic white disc. Align the protruding tabs with recesses inside cup. These an O-Ring inside the MC that needs to be replaced see red arrows.