Looks like two ( might be black) loops holding the wire between the two rear hood openings where the wires exit then one retainer at hood towards the drivers side
Impossible (well pretty much) to see on a Mach with the hood pad still in place
Interesting that, looking at pictures, NJ wires may have retained the wire differently. Changed the title to reflect the specific plant your looking for
The opaque "T" attachment is the same as used for the wiper motor wire feed.
Found allot of nice (not effected by the heat) in the trunk of mid to late Ford and Merc products holding the taillight wiring to the car. Also in power window wiring of same period.