WG 25K7194 Monitor connection question

[magugin]

I have a Wells Gardner Model 25K7194 and I have a connection question that is probably pretty simple.  This is my first post so please go easy on me...

On the WG K7194 Monitor board section where you connect the video cables there is a set of 6 pin connections (left side) and a set of 3 pins (right side).  I know that from left to right they are Red, Green, Blue, Gnd, +V.Sync, +H.Sync  and then the set of 3 are Gnd, -V.Sync, -H.Sync.

I purchased what was supposed to be a WG monitor cable but arrived with just the 6 pins, with the +V.Sync Yellow and the +H. Sync White.

My questions:
1.  I bought a Super Jamma Plus harness which already had the wires grouped and labeled.  The "Video" group has Red, Green, Blue, Black and a white wire (5wires)- What does the white wire plug into?  If I matched the colors to the 6 pin monitor cable I bought it would go to the +H. Sync. 

2.  What are the +/- V. and H. Sychs used for?   The harness that I pulled out did not use all of the pins.  It had the Red, Green, Blue and Black of course, but then had a white wire going over to the far right pin, which I think is the -H.Sync.  (I pulled out a custom harness that used a PlayStation as the game console and translated the controls to buttons on the CP- anyone want it? LOL!)  I think knowing what the +/-V. and H. Syncs are for will help.

3.  Did I buy the wrong monitor cable (just having a 6 pin connection)?

4.  If I do use the monitor cable that I have, I will have one extra/unused wire if I match the wires up with the "Video" cluster in the Jamma Plus Harness.
Thank you for any help or knowledge you can share!
Magugin

[buffett]

it should go like this. starting from the back of the chassis header going toward the tube.

1 red
2 green
3 blue
4 ground - black
5 not used for what you need.
6 not used for what you need.

7 key/blank space between header pins

8 ground - black if not using pin 4.
9 not used for what you need.
10 your wite / synk wire goes here.

Peace
Buffett