I know exactly what your talking about Jerry, I'm surprised I still remember some things.
Your correct about the cable from the MGS to the TU, it was only one cable. Nothing from the MGS went to the night sight. What's on the TOW you modeled is most likely an AN/TAS-4C and the one you mentioned you messed with was most likely a AN/TAS-4 or 4A with no post amplifier on it.
It's still a beautiful dio and if it wasn't for me and you knowing what we are talking about, no one else would know the difference.
Well thanks Pete but the only problem is tat the guy I built it for had the same job as me!!! So he knows! Or,at least,he used to know! Hahahaha
Me and him are pretty much on the same page.