Apple Video System - Manual (Page 40)

8 Squeeze the plastic tabs on the video input port’s access
cover and pull the metal retainer so the access cover can
come off.
Note: Your logic board may not look exactly like the one
pictured here, but the video-in slot and plastic access
cover are in the same position regardless of the logic board
you have.
Video-in slot Vertical plate
Plastic tabs
The plastic access cover is on the
other side of the vertical plate.
Metal retainer
34 Chapter 1