Apple Video System - Manual (Page 56)

5 Insert the RCA plugs on the other end of the audio cables
into the left (white) and right (red) sound input ports on the
video input card.
If you’re using a Y-adapter audio cable: Plug the double
end of the cable (where it forms a Y) into the right and left
sound input ports on the video input card.
The video input card ports are exactly the same on a
computer with a built-in monitor, and the card itself is in
about the same position on the back of the unit as in the
illustration below of a computer without a built-in monitor.
Your video equipment is now connected to the video
input card.
S-video cable
Cables with
RCA plugs
S-video port (7-pin)
Right sound input port (red)
Left sound input port (white)
S-video port (4-pin)
The ports on
your video
equipment may
be arranged
and labeled
differently from
those shown here.
Right Audio Out port
Left Audio Out port
50 Chapter 1