Xerox Phaser 7700 Service Manual page 193

Replacement.
Note Ensure the developer assemblies are fully and evenly seated when
reinstalling the Print Cartridge Plate Assembly. There is a
locating pin at the back of each developer housing assembly.
Note Lightly tug the wires to ensure that they are not pinched by the
plate or developers while reinstalling.
Caution Be very careful not to catch any of the wires on the left-hand side
of the plate while re-installing.
Caution There are two locating holes in the PCPA that corresponds to
locating pins on the frame of the printer. Failure to align the holes
with the pins prior to tightening screws could result in bending
the plate.
Note Center the connectors flat against the wire guide with the yellow
developer connector further to the right.
7-170 Phaser 7700 Color Laser Printer