headlight delay relay location?

I've never seen the headlight delay option on an A body. There is an headlight on buzzer option for A body but is pretty rare. I looked in my 72 Factory chassis manual at the wiring diagrams. Here is the headlight on buzzer option for A body diagram. Here is also the headlight delay option diagram for C body. I have never seen that on A body.
Do you have documentation on this? I cannot locate it.

(That is I've found mention of the relay but no wiring, no documentation)

20201201_082148.jpg

20201201_082156.jpg

20201201_082213.jpg