2005 Harley Davidson XL 1200 C Sportster Custom "hook battery backwards blew fuse" Questions

...one. Trying to figure out where the feed back is coming from. Sounds like a dead short check all the wiring A lot of the parts houses have battery's for the sportster but the post are backwards. ...

...AND IT DOES THE SAME..?? i have had that happen when i accidentally hooked cables backwards to battery.red cable(pos) to post w/ + next to it & black cable(neg) to post w/ _ next to it is

backwards IS a huge problem. Usually there is a main fuse near the battery. I would get a 12v automotive test light and start tracing the wire from the positive side of the battery along until you don