73 barracuda engine wiring harness ?

[Flathead31coupe]

The question is for the part of the wiring harness for the engine that runs along the valve cover in this picture.Where does this white piece fasten too that I circle in the pic. that's attached to the wire that runs along the valve cover on the passenger side.

 

[Challenger RTA]

Dual Ballast?

 

[Challenger RTA]

Single ballast.

 

[Flathead31coupe]

I went back and circled the part.I'm talking about sorry for their confusion.Thank you for the diagrams.

 

[72RoadRunnerGTX]

Slips over one of the valve cover harness tangs.

 

[Flathead31coupe]

Slips over one of the valve cover harness tangs.
View attachment 147579

Thanks