Stingray special 2018 bridge ground

I have recently bought a new stingray special 2018. While trying to figure out why I was getting some humming, I took the control plate off and noticed that the ground wire coming from the bridge is just floating in there, not connected to anything. Is this supposed to be soldered on to something? There is a spot on the circuit board that has solder but nothing attached and I was thinking maybe it is supposed to go there. I will be doing a gig tomorrow with it at a place that I know has grounding issues that give me a lot of humming and I would like to get this wire attached correctly before then if possible. I currently have it electrical taped to the underside of the control plate but it doesnt seem to be making a good connection and that is obviously not an ideal set up. Would anyone with a 2018 stingray special maybe be willing to open up their control cavity and take a look for me to see where that bridge ground wire is connected?