Yep, and at the business end of the drill, the rectangular frame has a couple of holes into which the heads of the gearbox casing screws fit. In terms of drill stands, I still have both types. This one is, in terms of the method of attaching the drill, essentially a vertical version of what I've just illustrated - for the earliest B&D drills without collars ...
... but this one is for the later drills with collars (the collar being the only means of attachment of the drill)....
... but this one is for the later drills with collars (the collar being the only means of attachment of the drill)....