Okay I'm not sure really what the part is called but will try my best to tell you what it is.
Under the battery, Under the carriage that holds that, I had to replace my 175 fuse on my 2003 blazer, Noticed when doing it the line that hooks to that to I do believe the alt it was spliced, Was damaged so badly that I had to rig it up very poorly just to have power to get to work this week. Does anyone know what that line is called? I do believe it might be called a fuseable line or something along that term? But I need to know where I can get a replacement asap, Thank you for the help