The Plastic Access Cover is the part that replaces the existing closed port cover and provides a hole for the DB-15 segment of the External Video Connector (EVC). The Plastic Access Cover mates to the Metal Bracket, which itself attaches to the DB-15 segment of the EVC.
Because it is slightly larger than the original Plastic Access Cover, it obstructs the wire handle on the logic board fence (used to pull the logic board out) and is too large to fit through the opening in the rear I/O door (the large plastic panel removed to gain access to the logic board).
IMPORTANT: There is no way to make use of either the revised Plastic Access Cover or the Metal Bracket in the systems listed above without actually filing down the Plastic Access Cover itself. These two parts were included in error in the revised External Video Connector Kit.
Instead of using the Plastic Access Cover and its Metal Bracket, use the two Small Metal Brackets included in the revised EVC Kit. These brackets allow the EVC to be installed into the PDS card port of 580, 52xx, 53xx, 62xx, 6300, and 5260 units, or into the video-out card port of 5400 and 5500 units (the ports have different names, but they are situated in the same place on the logic board fence). The following illustrates the old and new install locations.
Instructions for making use of these two Small Metal Brackets can be found on page 5 of the External Video Connector User's Guide. The process is simple:
Again, the options are either to file down the original Plastic Access Cover or install it, using the two Small Metal Brackets, into the new install location as pictured.