On one side, the transformer has two winding each with two taps for a total of 8 pins.
On the other side, the S-22 has two windings each with a single tap for a total of 6 pins.
I'm guessing the two pins that are in a row by themselves are pins 13 and 14 in this chart:http://www.amwindow.org/tech/htm/modtran/utc/sseries.htm
(only the S-22 had pins 13 and 14. The other S series had only 12 total pins).
Should be pretty easy to figure out.
Note that depending on the ratios you want and the pins you select, either "side" can be the primary.