I came across these in an auction of a bunch of Atari service manuals. I am assuming they are super rare. They are very large so I had to stitch them together the best I could. The only mention of them that I could find anywhere was in an ad in issue 14 of Analog Computing.
https://archive.org/details/atari-410-schematic-a-skematiks/Atari_410_Schematic_A_Skematiks/
I don't know how accurate they are but for the sake of preservation, here they are.
P.S. It is amazing how terrible Google is. I did a search for 'Skematiks', a very strange spelling that would have very few hits. I got nothing. I did the same search on Archive.org and the ad in Analog magazine came up easily. Wow!!