I do not think it will matter. The sensor produces a small AC voltage so no need to worry about a ground.
That's not really solder -- I believe it's bismuthThanks so much guys! All i have to worry about then is having a good strong connection!
Yes @Ravalli Surfer i have awg 14 to 16 heat shrink tubing with solder in the middle. All i have to do is heat it up with a heat gun and the solder will melt and the tubing will shrink to keep it tight.. a little bit of electrical tape around the wires too should help.