Trying to rewire speaker lines to JAMMA (was hard wired to board).

[Enduro]

Hi all.
Please bare with me, I'm a newbie and I didn't quite see a problem similar to mine in my searches. 

I've got a Contra cab with a Devastators board in it that had wires soldered directly to the board and then attached directly to the two speaker wires with nuts.  The rest of the wiring is as it should be through the harness. I got this cabinet so I could put a 60-in-1 in it (I've got no love for Devastators and had cold feet about converting my DigDug cocktail after learning the conversion kits might not work for my Atari DigDug).  I've got the new 60-in-1 in and it works fine but I'm antsy to have direct audio coming from the machine but I'm worried about damaging myself or the board/cabinet.  I've seen harness diagrams but I'm not sure which wire is power and which is data.  Also, I'm not sure how to securely put the wires into the harness. 
Any kind of links or info would be appreciated. 
Thanks for your patience and consideration,
mark.

[matsadona]

Hi

I'm trying to understand the problem here... Is it a JAMMA harness in your cab, but without the speaker wires (that has previously been hardwired to the Devastators PCB)?
Then you only need to solder the wires back to the JAMMA connector pins 10 and L.
http://www.jammaboards.com/jcenter_jamma_pinout.html

[Enduro]

It is a JAMMA cab with JAMMA harness and yes, that's the issue.  They removed the audio wires from the JAMMA harness and wired directly to the PCB (any idea why one would do such a thing?).  Is there an easy way to tell which wire is which when I put it back into the JAMMA harness?  My 60-in-1 also has mini-stereo out (which I've been using in the meantime) but I'd rather get the machine working as it should.   

[Enduro]

Looking at the sticky above, I'm thinking a multimeter may be in order?  D'oh.

[codecrank]

is wire # L and # 10 coming out of the harness ripped or cut ? anything left you would solder a new wire on to ? if not, you can always get a new harness , it's cheap. this one is 10$ and has all the connectors crimped already.

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