ok...
the RGB GND is done...the only thing left is 5 and 6 and you have one wire.
That one wire will be hook up to 5 and nothing on six. If you look at you Sould Caliber Manual, it should say something about connecting it to NEG V/Sync(Composite), so just hook it up to 5 and your set. You might not even need to destry the second block, just hook it making sure the WHITE wire is hook up to 5.
You better hope that the NEW monitor will accept COMPOSITE SIGNAL, like I mentio above, some monitors don't work unless you hook up the V/H separately, if this the case, you need to look at your Soul Caliber PCB and see it it has separate V/H also.