When working on my running boards I noticed under the passenger side on the frame I have a box that has a bunch of wires going into it, is this another battery? Why would I have another battery. if so can this be used as a inverter battery can I make a spot in my van for a fuse box? and run from that? This looks hard to get open anyone ever dropped this box down. if I unhook the engine battery and start messing with this will I take a chance of getting zapped....

 

Post a photo please.