The secondary runs from your transformer to the backbox. You sure that isn't part of the switch matrix?

Sounds like you are looking for the cable that connects the ball through optos to the 7 switch opto board. Not sure what the part number is. I'm actually working on a TOM as well, so I can check the harness for you tomorrow - just gotta find it

I'd imagine it's P/N H-20016.1

Jim Shird should be able to make you a new one reasonably that will look and work just like the original

Contact him through the form on his site here:

http://www.jimspinballshop.com/

He should be able to verify whether that's the harness you need or not.

Once you order another, it'll surely turn up!

Otherwise, here's the breakdown of the cable - the 17xx is the line item #, the # at the end is the quantity (for the wires, length in inches)

1705 .2 H-20016.1 trough opto cable-50039 1
1706 ..3 03-7520-2 tie wrap-nylon 3 7/8 4
1707 ..3 5792-10775-00 4R2004 03-06-1044 1
1708 ..3 5792-12116-09 9r mt/end 22/.100 2
1709 ..3 5792-12116-10 10r mr/end 22/100 2
1710 ..3 5821-09079-00 pf1561 02-06-1101 4
1711 ..3 5823-12119-00 plz key-mt .100 4
1712 ..3 CW-30022-0 wire 22awg black 29
1713 ..3 CW-30022-84 wire 22awg gry/yel 27
1714 ..3 CW-30022-31 wire 22awg org/brn 19
1715 ..3 CW-30022-32 wire 22awg org/red 19
1716 ..3 CW-30022-30 wire 22awg org/blk 19
1717 ..3 CW-30022-34 wire 22awg org/yel 19
1718 ..3 CW-30022-35 wire 22awg org/grn 19
1719 ..3 CW-30022-36 wire 22awg org/blu 10
1720 ..3 CW-30022-81 wire 22awg gry/brn 21
1721 ..3 CW-30022-82 wire 22awg gry/red 21
1722 ..3 CW-30022-83 wire 22awg gry/org 21
1723 ..3 CW-30022-80 wire 22awg gry/blk 21
1724 ..3 CW-30022-85 wire 22awg gry/grn 21
1725 ..3 CW-30022-86 wire 22awg gry/blu 10

I don't think Jim is on pin side. Inquiries through his site generally take a couple days to get a response.

I rob lots of wiring off of parted out games. I save the wiring harness that i can separate, but there is always a lot of extra wire around 22 awg

That looks fairly easy to make!