Hi,
some years ago I gave a promise to an ABBUC member to make a video-out solution for his Atari 400 without the need of changing parts, scratching conducting paths or any other destructive mod to his Atari 400. He´s a real "hardcore" collector with no way in give-and-take regarding this point.
After tinkering around with an "add-on" PCB for the GTIA socket I failed, because there´s not enough space. Of course - from a collector´s view - it´s a No-Go to remove the metal cabinet, so I de
Another idea is to lift the last part (coil or resistor) in the trace path for Chroma, Luma and Composite video and solder the wires fromt the SCCC into. This way you didn´t need to bend the contacts to the power PCB.
Just remove the pin showing to the power PCB connector, so that the coil/resistor is only connected with one pin. The now free pad can be used to solder the relevant wire from the SCCC into. Finally three smoothing caps should be removed: C174, C175, C176.
L104 = Composite