The 67 covers have a hole for the banana clip to snap into
In 67 there were two different floating clips, the square on the right side of the engine. I do not know if this was done in other years, early or late.
View attachment 1715885862
View attachment 1715885863
Alan
The wire clip on the right side of your second pic is the one I was talking about #4 above. I know my 65 Commando 273 originally had at least one of them on the driver's side. Can't remember if I had one on the passenger side, or whether my car had any of the long inline clips when it was new.