Charger/Commando valve covers.

67s have the rubber grommet on pass side with the "cupped" harness holder. Ds has stove pipe.
I got pics somewhere
Heres pics hope u can make it out.

View attachment 1715397247
A close up of the harness holder would be dandy.

The hose you see in 4spdragtop's photo is for the CAP (Clean Air Package) system. 1965-67.