Hmm, there seems to be a 470 ohm resistor (appropriate for dropping the voltage from TTL level) and a 220 µF capacitor in series with the sync line. I don’t see a sync stripper. Maybe the stripper has been moved inside the connector at the console end?
What console and what version (PAL/NTSC?) did you use the pictured SCART lead on? Maybe someone more knowledgeable than me can comment on whether the 220 µF capacitor on the sync line is appropriate for that one. I’ve never seen a capacitor placed between the output of a sync stripper and SCART pin 20.