91 240sx fastback help!!!

[vegas240]

Hey all! i'm new here and tried a search but nothing came up on this topic. I have a '91 240sx fastback. The rear of the hatch was completely rusted from the stock spoiler so i sourced a junkyard hatch. When they removed the hatch, they cut the wiring from that goes from the car to the taillights/window defrost/rear wiper. I got all the wires on the passenger side spliced together, but on the drivers side is a grounding wire and another wire that is like a mini-coaxial cable. Anyone have an idea how to wire these together? Please HELP!