[Milsurplus] Mystery Y-cable?

[Jack Sullivan]

  Some years ago I picked up an Army surplus Y-cable that had a MS3116-14-5S connector that fit the matching -5P connector on the bottom of a U-383/VR PRC-77 voltage adapter used in military vehicles.
The bottom end of the Y is a Bendix -4S connector to which I can attach a KPT04-8-4P plug that I wired up to power my PRC-77 from 24 volts. I can't make out any additional nomenclature on this but the base of this connector (which I assume attached to a power source in the vehicle) is a T from which the 2 legs of the Y start. The shorter leg ends in the MS3116-14-5S. It is about 3' long. On it is a black plastic sleeve bearing the yellow lettering Z-ACD/1. There is also a metal collar with a locking cap on a wire for the -5S connector.
The other leg of the Y is 6'0". It has 2 sleeves. One says AM-1780 AM-4979 AM-6747. The first is a VIC-1 audio system junction box & the others are amplified loudspeakers. The other sleeve has: CX13140/U and MDA904-80-6-0720. There is another collar which has J3723/VRC on it.
I can't find that cable on Google, the Z-ACD/1 or the J3723/VRC either.
Is anyone familiar with this item?
Thanks!
Jack
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