As far as I can tell, the 1717169-2 and 1717169-1 are identical parts, as far as specs and dimensions are concerned. Not sure why there are two part numbers. The pins on the connector seem to support S-Video directly, as in it supplies all the right pins for it. You will need a couple passive components and some custom wiring to convert it to a composite video out (usually an RCA barrel jack).
http://www.tkk.fi/Misc/Electronics/circuits/svideo2cvideo.html
The C and Y pins are on the EXT port, as is a ground connection that can be used as a common ground for both C and Y. That guide suggests a capacitor between the C and Y lines; another guide showed two resistors. Not an electrical person, so I don't know if they are equivalent circuits.