Pinwikki has pictures of the ground mods.
http://www.pinwiki.com/wiki/index.php?title=File:GTB_Sound_Speech_ground_Upgrade.JPG
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Pinwikki has pictures of the ground mods.
http://www.pinwiki.com/wiki/index.php?title=File:GTB_Sound_Speech_ground_Upgrade.JPG
You should only need to make sure the harness connection between MPU and driver board is correct - just buy a new harness already assembled ksarcase has them for $35. Do the ground mod for the original sound board. Solder a ground wire from P2 pin 2 or 5 and connect to ground. Pin 2 and 5 are connected by a solder trace so either will work.
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