Wrap a long blade screw driver with electric tape, you'll need it. Install the end that does not have the adjustment holes, then, while somebody holds the decklid up, use the taped screw driver to slightly bend (it gives a little) and control/pry the adjustment end into the slot it rides in AND also put the tension end into one of the tension slots.
67 GT 350 (#0036)("Miss July" 2004) owned since 1971. And I still drive it...SAAC 29 Concours GOLD, Div II, MCA Concours Trailered Gold 2X,
Also: 67 GTA S code COUPE (under construction)
General Shelby and Mustang enthusiast, MCA certified Concours judge