My 71 Coronet Brougham did have the light group (ashtray and glove box light,and map light,rear door light switches),but did not have fender mounted turn signals.
My 73 Satellite does not have the light group and has no ashtray or glove box light.
Both cars are equipped with the white/clear plastic glove box.No hole or plug in the 73's glove box.
Mopar engineers in their wisdom,designed the wire harnesses for both standard and ralleye to have the extra connections built right in.As the car went down the line,and according to the B sheet,the workers installed the necessary options.
39 years later this makes it easier for us to install the lights we want that the car was not born with,IMO.