Apple Video System - Manual (Page 51)

Connecting video equipment if you use
a composite (RCA plug) connector
To connect your video equipment you need one video cable
and two audio cables, all with RCA plugs at both ends. The
cables can be separate or joined. You can purchase cables at
electronics supply stores.
Note: If you have only one Audio Out port on your video
equipment, you can use a Y-adapter audio cable. This cable
has a single plug on one end to plug into your equipment
and a double plug (where it forms a Y) on the other end to
plug into the two audio ports on the video input card.
RCA RCA
RCA RCA
RCA RCA
or
RCA RCA
RCA RCA
or
RCA
video
audio
audio
2 audio
video
2 audio
video
RCA
45 Installing the Card and Software and Connecting Video Equipment