Howard,  Bob Taylor is correct regarding that "Pedal Augment" switch.
It simply also coupled the low 12 Pedal notes up one octave, so you got
a 16' and 8' pitch of the same rank playing together.  It affected any
rank that was being played in the Pedal, not just one of them.  From
what I can learn, this came on some later organs and not the first ones,
before 1910 or so.  The diagram I have does not have this coupler; but
it is very easy to add to the switch stack.

Aeolian was not consistent with these players and it seems that some
evolution was always taking place.  Some have this and some do not.
If you want to e-mail me with your address, I have the wiring diagram
of the 116-58 note Aeolian player, and will send a copy to you.

Should you go off the deep end and get one of those 10-roll Concertola
players, I have those wiring and plumbing diagrams too.  Some are hard
to read; but these are the only blueprints I ever saw for that player.
It is extremely complicated.

Just to put something else about Aeolian tracker bar lists to rest,
years ago I came up with LCW to mean "Let's Confuse Welte" as a joke.
What these holes are for is to couple other added divisions in large
Aeolian organs: they operated coupler switches and were routed through
the reversible switch stack.  First time ON and second time OFF.  It
means "Couple to or from".  Certainly they were hand wired for the
particular organ that had added divisions.

From a 1928 issue of the American Organist, and thanks to Jim
Weisenborne for finding this.

  G = Great
  S = Swell
  L = Solo
  C = Choir
  W = Antiphonal
  E = Echo
  X = Chapel or Solo Echo
  Z = Great Echo
  O = Orchestral

Jim Crank