Epson AcuLaser C2900N Service Manual page 442

Chapter 3 Removal and Replacement Procedures Revision B
4) Mate the five bosses of the printer with
the holes of the SHIELD ASSY ESS,
secure it with the eleven screws (silver,
6mm).
5) Insert the lower tab of the PLATE ESS
into the slit of the SHIELD ASSY ESS,
after inserting the upper tab of the PLATE
ESS into the slit of the SHIELD ASSY
ESS.
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Epson AcuLaser C2900N