Yes i saw that artical but i was going by another one...http://www.ipdb.org/files/856/Williams_1980_Firepower_Prototype_Drop_Targets_Info.txt
Specificaly where this artical says you can wire it in a way with any williams drop target bank so that the software would have extra information to know that all the drops are down but its not entirely clear.
Step 7: Wire the switches.
The drop target switches are wired in the same place in the
matrix as the standups. That information is as follows, from
left to right:
"1" drop target - switch 17 (Green-Orange/White-Brown)
"2" drop target - switch 18 (Green-Orange/White-Red)
"3" drop target - switch 19 (Green-Orange/White-Orange)
"4" drop target - switch 22 (Green-Orange/White-Green)
"5" drop target - switch 22 (Green-Orange/White-Blue)
"6" drop target - switch 23 (Green-Orange/White-Violet)
The early style drop targets (horseshoe/wiper) had two sets
of contacts -- momentary and continuous. The momentary are
activated while the drop target is on its way down, and the
continuous are activated while the the target is resting in
the "down" position.
The easy way to connect the drop targets is to simply use
the continuous contacts on each target and connect it as listed
above. This is the way later style (Black Knight and later)
drop targets would be wired.
The original Firepower, however, used the momentary contacts
connected as above. The continuous contacts were connected
in series within each bank, and connected into another place
in the matrix. This gave the software an extra piece of
information that all the drops in a bank were down. You
can connect your drop switches this way, but its extra work
that is not necessary. Here are the switch positions:
"1-3" drop target series - switch 20 (Green-Orange/White-Yellow)
"4-6" drop target series - switch 24 (Green-Orange/White-Grey)
The "10-point" switches are wired as follows:
"1-3" drop target standup - switch 55 (Green-Violet/White-Violet)
"4-6" drop target standup - switch 52 (Green-Violet/White-Yellow)
When wiring switches, note that the White wire is connected to
the anode of the diode (side WITHOUT the stripe), and the Green
wire is connected to the switch terminal NOT connected to the
diode. Refer to another switch on your playfield as a guide.