The glass panel is w360's call - I'm not designing it. By his request V6 has M4 screw taps in the four corners of the chassis though, so it will probably be the former.In regards to the glass window, is it going to be affixed to the case with screws that stick out, or is it going to be a flush solution like we have now with a piece of glass attached to a stock side panel?
Commenting on the two approaches, I'll say they have their pros and cons; glass-on-panel would be thicker, and thus more noticeably not-flush with the front panel, vs. just glass with bolts.