I hate to throw a wrench in the works, but my 02C Los Angeles built '68Z has the "front lighting harness*
" routed between the inner and outer fenders. My Z has the Rally Sport (RS) option, so maybe that it why it's different. The three vacuum hoses (one from the intake manifold and two from the headlight switch) for the RS equipment are within the "two vertical plastic straps". These two "straps" are mounted approximately 8.75" apart (center to center) on the inner fender. Also supported in the front "strap" (the one closest to the radiator support) is the sub harness for the wiring to the alternator and cylinder head mounted temperature switch. Below and offset to these two straps are two more straps. These two lower straps are single hole mounted "loop straps" mounted approximately 8.625" apart (center to center) on the inner fender. These two lower straps support the windshield washer reservoir hose and nothing else.*
This front lighting harness on my car also includes wiring to the engine (alternator, temperature switch), brake switch, horns, horn relay, voltage regulator, etc. and is mounted to the outer fender (on the inside) with two white plastic clips. One of these clips is located below the left hood hinge and the other above the RS tank vacuum relay valve. Hope this helps.