Sound gear / Ibanez SR 500 repair

Successfully repaired the negative lead from the 9 V battery that had popped off the board.

In doing so the ground wire from the bridge became detached from somewhere . Looked around on both sides of the magnifying glass and can’t see where it detached from.

Wiring schematics. I’ve dug up online say it should be soldered to the ground on the volume knob, which is on the other side of the board and seems unlikely.

Definitely trying to resist soldering it to the green wire coming from the quarter inch jack .

Your thoughts, citizens?