I was fixing some bad connection in a bass guitar output jack and realized that there seems to be no ground wire. Not sure because it's my first time but a short research seems to indicate that it is missing. I describe what I see: Bass guitar with 3 knobs: 1 Tone and 2 Volume ones.
I realize that a black wire was badly connected to the first knob (tone) by a few metal strings and those broke easily. That is the wire I need to solder into the knob.
The output jack has 2 metal plaques. The outer one connects the knobs in series. The center one has no wiring (this is the ground, according to diagrams in websites)
There are no other wires, so I guess this bass didn't have any ground? Is it OK/safe to play it in these conditions?