I purchased a 74 Datsun 260z recently and when I went to go check it out it was running after jump starting it, I couldn't really take it out for a test drive due to the fact that the previous owner had switched the dash board and could never get it back up, after I towed it home that night I couldn't get it to start up, only the head lights and tail lights would light up, the following day I had no response whatsoever his time not even the lights would turn on, so I took the battery to auto zone hoping maybe charging it would help but they couldn't pick up a signal on the charger so couldn't charge it, they suggested I get a new battery but luckily a friend off mine had a spare, after charging that one we went ahead and set it up and the car and this time I had no response again only the box I circled began to spark and smoke, I'm not sure exactly why but any time I have tried that always seems to happen so if any one can help me determine what the issue could be I'd greatly appreciate it.
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