Oscar-
Much later today and with a much worse camera than I had hoped, but here are a couple of shots of one of the boards. The other board off of this trackball is identical.
I vertically mirrored the back (trace) side of the pictures, so that following the traces would be easier. If that's bad, I can put up unaltered pics. The numbers on the pins are added by me (obviously) but are the same as the ones printed inside the molex jack.
(temporary pic attached)
And here's one held up to the light to highlight the traces a little better.
Just to do a little stating of the obvious...
Pins 1 and 3 are bridged, and the only trace from Pin 3 leads to empty solder points
Pins 2, 5, and 7 also seem to lead to empty solder points
Pin 6 has no traces coming from it at all
Pin 4 leads indirectly to one solder point on the big-curved-black-thinggy (a technical term)
Pin 8 leads to one of the tripod-black-thinggies
Pin 9 looks like it directly or indirectly leads to 4 solder points under the big-curved-black-thinggy
Pin 10 seems to go directly or indirectly to the other side of everything Pin 9 goes to
The round-green-thinggy says ".IM 25V Y5F MEXICO"
The tripod-black-thinggies say "NP 3643 EBC"
The shiney-tube-thinggy says "10uF 20V10X 7905" (the "u" is actually the electrical symbol that looks like a p with the top chopped off, and the "X" could be a %)
The two maroon striped-tube-thinggies closest to Pin 9 have 1 yellow, 2 lavender, and 1 gold stripe (in that order)
The four beige striped-tube-thinggies have 2 orange, 1 black (or dark brown), and 1 gold stripe (in that order)
The two maroon striped-tube-thinggies farthest from Pin 9 have 1 orange, 1 white, 1 red, and 1 gold stripe (in that order)
Etched wording on the trace side of board itself includes: "STEERING BD," "ATARI 79," "A009060," an "E" in a square, a "P" in a circle inside a triangle under and to the left of a "1" or "I", and "009061-01."
Sorry about the obnoxious detail, but too much is better than too little information I hope.
If you can do anything with these, I would love to hear which pins are which.
Thanks!
-Al