that looks like a really good looking setup there the MB. haven't seen any camo...
a USB cable is really simple... positive, negative, and two wires inside. sometimes black and read and I thinking sometimes read and yellow (I think). diagrams on the web... I probably have 20 unused cables around and have cut a hand full to make variations. making an aligator setup should be very cheap and easy. for a clean setup I'm sure you can buy various adapter on fleabay for pretty cheap.
I've never seen any lifespan ratings on solar panels so I'm thinking over the years you will really get you money's worth out of a setup like that.
im thinking it should work fine for rechargeable batts... want to do a couple setups one for flash light batts, one for digital devices, and have one I can leave in the car. I use rechargeable batts in my computer keyboard and mouse and could just charge them from my window. also for my phones... there's been plenty of times I needed to charge a phone on the go but couldn't leave my car running or plug in anywhere. in emergency situations you may loose power and need to run a flash light for extended periods of time. being able to charge batts when the light isn't needed makes since.
good deal! great investment!