The PCB contains an error which was inflicted by the PCB manufacturer. The pads for the toroids have green solder-mask on them. This is easy to remove by scraping with a craft knife or screwdriver blade. The pads in question are shown here circled in yellow:
This picture shows a side-by-side comparison. CLICK HERE for a much larger version of this photo - 3065 x 2024 pixels (593 KBytes download).