I have 308 GTSi. I think I may have plug the battery in the wrong way for under 10 seconds with ignition on. I did correct it and install it the right way, I have 2 black cables. I can now see which is the ground/negative. I installed it, and was able to go into the cable and re turn on the igition and turned over, but did not start it(No gas in tank). Upon getting out of the car right away I saw smoke coming from under the deck (closest to the cabin). I ran immediatly to unhook the battery, I rechecked the ground it was correct. I havent connected the battery again. If I attempt to connect it I get a large spark, took and mulimeter and light bulb to it. It appears I have a short from the battery wire. I cant see where. I can assume it's the Regulater which is attached to the alternator. Could this be the piece that was smoking? Could this be what is actually giving me the short ? Any help would be greatly appreciated.