[Info-vax] Documentation for Storageworks Drive Shelf?

[Lee C.]

Hi all - I'm looking for any documentation for a Compaq Storageworks disc shelf replacement PN 123476-001. Yes, I know its ancient, but its what I've got... and it was free. Picture of this shelf here: 
http://www.recycledgoods.com/zoom.aspx?productID=35777
I'm trying to determine the meaning of the indicator lights on the lower front right panel. Also any configuration information for using with a DS20E. 

I scoured the HP website, with no luck. Even check bitsavers.org. 

Thanks for any pointers to info on these shelves.

Lee C.