Precedent 48v with 12v batteries

[travis_slim]

I will start off by apologizing because this could get a little long as I have been doing a lot of research and on these different questions and have not come to a real solid conclusion so I am reaching out to the members who have already done these projects. I have found a lot of info on Precedent’s with 6 8volt battery carts but not 4 12 volt battery carts.

So I have a 2007 Precedent with 4 12v batteries. I would like to add a deluxe head light kit and a radio to the cart but seem to be somewhat lost on powering these accessories. I know I can buy a voltage reducer or convertor to come off the batteries and make 12 volts. But what is interesting is on my cart I have two pigtails on two different batteries. When I put my voltage meter on the pigtails they show 12 volts….. Now what is so interesting to me is that this is two separate 12 volts batteries. I have attached a few pictures of it. Does anybody know if this 12 volts is pulling off of all 4 batteries or just the two, and if so how? If I can use this to run my lights off of it that would be great and if it can also run my radio that would be even better.

The other question I have is when I watch videos of the light kits being installed they install the voltage reducer under the dash with a wiring harness that plugs into the factory harness. If for some reason I use a voltage reducer or convertor that does not have that factory harness how to you power up the lights? Here is one of the videos I have watched: https://www.youtube.com/watch?v=3IUy0c99Qf0

So I the other question I am curious about is what antenna is everybody using on their cart? I am looking at buying a kit on eBay to install my radio and speakers but not sure of a good clean way to hide the antenna.
Below is the list of items I plan on installing. Feel free to give suggestion or opinions on them. Or even suggest purchasing something else.

Radio Kit:
http://www.ebay.com/itm/Club-Car-Pre...-/200650261253

Deluxe Light Kit:
http://www.ebay.com/itm/Club-Car-200...item51c66be85e

MadJax Voltage Convertor (Only if I need it)

http://www.amazon.com/Amp-Golf-Cart-Voltage-Reducer/dp/B00DRFFLDG

http://www.amazon.com/Amp-Golf-Cart-Voltage-Reducer/dp/B00DRFFLDG

I really appreciate the help.