I generally use a single solder lug on a screw to ground the cavity tape.

I have thought about using something like this terminal strip to avoid making too many connections on the back a pot:

https://www.solomusicgear.com/produc...h2kLCGPEhq9wlw

My G&L came with a couple of them.

Now I usually just run a thin wire from the ground lug of the volume pot. It's good for adding grounds to the volume pot without soldering them all directly to the pot casing. An alligator clip on either side of the new connection as a heat sink keeps the other connections from melting. Not as elegant as the terminal strip, but effective.