On mine, the gray wire is separate but follows the headlight harness.
Vintage Burgundy 1966 Mustang GT Fastback (Midlife's younger brother)
MCA member #46447
http://albums.photopoint.com/j/View?u=1582316&a=12109501&p=45219402.jpg
Vintage Burgundy 1966 Mustang GT Fastback (Midlife's younger brother)
MCA member #46447
http://albums.photopoint.com/j/View?u=1582316&a=12109501&p=45219402.jpg