Where does this negative cable go???

I have a 2008 GT that the previous owner relocated the battery to the trunk. There are ground wires everywhere in the engine bay. I found 2 that weren't connected to anything, one I was able to figure out where it went. However, the other I can't seem to figure where it goes or if it's even necessary. Need your ideas as to what to do with the ground cable. Thanks in advance!
 

Attachments

  • 20191228_160035.jpg
    20191228_160035.jpg
    297.7 KB · Views: 146
  • 20191228_160017.jpg
    20191228_160017.jpg
    233.2 KB · Views: 152
  • 20191228_155959.jpg
    20191228_155959.jpg
    268.7 KB · Views: 156
  • Sponsors (?)


If the battery is located in the trunk, you need the vent hose to the outside like the Lincoln LS has. The battery has a nipple for a hose which vents the H2 outside.No explosion danger that way.