Control Scripted placement of Dot within existing object's Bbox

Scripting
1

Using this script piece based on a larger script by @Helvetosaur

I played around with the variables, and researched, but couldn’t come up with anything consistent. Here’s the part of the script I’m talking about:

        bb=rs.BoundingBox(obj)
        text="{}".format(layer)
        dot=rs.AddTextDot(text,(bb[0]+bb[6])/2)
        group=rs.AddGroup()
        rs.AddObjectsToGroup([obj,dot],group)