What's a HEI distributor and why would you want to disable it? : )Had one similar to that in the glove box of my '69 Chevelle to disable power to the updated HEI distributor.
To keep the metal bits from scraping on each other, making noise that detracts from the SL ride. Both my SLs had them, in factory original colors and styles. From that, I'll guess that MB put them in there. I left them in.