Thank you Brandenburg and AlexR.
Gotcha. I was confused about that.
On the pickup I have, there's 1/2" of wire with a ball of solder at the end attached to the end of the braid. I guess the intention was to make soldering to the pot easier. I can't use that though, I think, because the lead is 1" long. I've got to splice another piece of braided wire to it.
So the volume casing gets two things soldered to it? The braid and the wire coming from the jack?
In this setup there is no ground going to the tremelo claw?
Please excuse my ignorance, this is the first time I will be doing this.