I think I have the correct wiring diagrams, but I'm unclear on how to earth to the bridge. The bridge is solely on the top of the guitar, there are no metal posts into the body.

Name: DIB-1F bridge.JPG Views: 413 Size: 14.4 KB
Click image for larger version.  Name: DIB-1F top.JPG  Views: 249  Size: 27.5 KB  ID: 42399
Click image for larger version.  Name: DIB-1F back.JPG  Views: 244  Size: 20.0 KB  ID: 42400