The pending approval stuff stops after 3 approved posts. You should be good now.
I have a working Modular in my hand. Assuming you insert the diodes such that their bodies are in the holes with the rings, then the stripe goes up. The white rings indicate where the bodies of parts go. The white diode symbols, also printed on the board, indicate the polarity of the diodes. So I think your diodes are probably backwards but a picture would help to confirm.
Look into it later when the dust is clearing off the crater.