okay, I think I'm understanding this better now, so here's what I think I need to do.
1) run ground wire from bridge into bridge pup cavity
2) solder the ground wire to copper shielding in bridge pup cavity
3) run ground wire from bridge pup cavity to back of pot in control cavity
4) shield back of pickguard around neck pup cavity
5) solder ground wire to neck pup cavity shielding
6) run ground wire from neck pup cavity to back of pot in control cavity
From what I've read, since the outside of the pots are all connected by the metal of the control plate cover, the ground should only need to go to one of the pots but I may run another ground to the other pot just to be safe.
For wire, I think I'll just remove the braid and use the cloth covered inner wire for the grounds.
