Headlight left on buzzer diode

[70/6chall]

Was wondering how rare is rare. The internet doesn't give up a lot of info on these. This is the one I have 1970 headlight left on warning buzzer diode Mopar part# 2983595. I understand these are not only for the 1970 Challenger/Barracuda Cuda e-bodies but also for the B-bodies 1970 to not sure here. Any enthusiasts have added info on these parts? Is this something needed? Thanks,   Al

[Skdmark]

It's part of the A01 light package. I have it on one of my 71's.

[Jay Bee]

It's part of the A01 light package. I have it on one of my 71's.

The ongoing debate. Seems like Cuda- NO, Challenger - YES (Lamp-On Reminder Buzzer)
Check out Replies #6 and #7
https://forum.e-bodies.org/electrical-and-audio/11/just-a-light-reminder/9502/msg131886#msg131886

[Skdmark]

My 71 with A01 is a Challenger. Interesting Barracudas / Cudas don't have the buzzer.
On the fllip side, R/T's and 340 Challengers don't get the fender mount signals, but Cudas do.

[Jay Bee]

My 71 with A01 is a Challenger. Interesting Barracudas / Cudas don't have the buzzer.

Maybe, could it possibly be a separate option???    
So, back to 70/6chall original question...I guess that would make it even rarer.