
What is a easy fix to connect the ground wire back?
Well the ground is kind of acting as a shield. Since the likelihood of you needing a shield is next to 0, you can simply bridge the wire.
Just get some heat shrink and then try and strip back some of that plastic sheathing around the ground wire and expose the ground more. Then grip the ground wire and pull it off to one side and twist it together.
So the same with the other side.
once you have both sides twisted together, get yourself a desired length of some wire ( I am going to call this your bridging wire) you have lying around and some heat shrink that is longer than the bridging wire by about an inch.
Now strip the two ends of your bridge wire and solder one end of the wire to your twisted grounding wire.
Once soldered, slip your heat shrink over your bridging wire and your ground wire. You may have to push the heat shrink back to expose your other end of the bridging wire.
If you had not already guessed, simply solder the other end of your grounding wire bundle to the opposite end of your bridging wire.
Slide the heat shrink over to cover as much of the exposed wire as possible, and then heat it up to shrink it down over the wire.