[MENTION=358081]Sir_Name[/MENTION] identified a window on the BB DT lug which can be seen in the first of the three photos above. Mine does not have a contrasting paint in it.
[MENTION=407560]kykyky138[/MENTION] - Here is an example of the lugs and the DT bottom HL cut out.
[IMG]P9201302 by superissimo_83, on Flickr[/IMG]