Radio DC power cable

[Cybul]

Hi.
I have a question about 10570-0705-A021 cable.



It has red wire which is +28V, black wire which is 0, and brown wire.
Red = Pin B
Black = Pin A
Brown = Pin C
Pin D is unused.

Where is the best place in Hmmwv to connect this cable? Red/Black can be connected directly to the battery, but where should the brown wire be connected?
I found information that on brown wire 14V should be supplied when the ignition is turned on, but I am not sure if this information is correct.

 

[KKroger]

Battery Box, it goes through the hole in the tunnel then in behind the Shunt there is a pass through. then Connect to the positive Buss and the Shunt Black to shunt Red to Positive Buss. the brown will need to go to the BACK battery positive terminal, and the 14V cable needs to be from the alternator to the battery.