Where to install ground wire if you can't get to the bridge

[burkhardty10]

Where are some alternative places to put the ground wire that would usually go underneath the bridge?

[RickenBoogie]

The jack plate maybe, but I'd just make sure and put it where it belongs, connected to the bridge.

[Bassman822]

One of my jazzes has an extension of the brass grounding plate (for the bridge p/u) passing under the bridge

[walterw]

it has to go to the bridge, unless you run it up the side of the neck and attach it to the tuning keys

[line6man]

You need to ground the strings in one way or another.
You can't ground anywhere where the string is vibrating obviously, so that leaves the bridge, and the area above the nut.

If you want to ground from a brass nut or a bar style string retainer, that would work fine, but you are going to have to either drill a channel all the way through your neck, or run a strip of copper tape across the back of the neck.

Grounding from the bridge is pretty much the only practical way to ground the strings.

If you don't have a channel drilled from the control cavity to the bridge and don't want to drill one, you can resort to running a strip of copper tape from under the bridge to the shielding inside of the bridge pickup's cavity.