Be sure to remove main power and de-energize the equipment before performing any maintenance operations
take pictures beforehand for your refence then reassembling.
Remove the 6 hex screws
Remove and retain the 6 hex screws that secure the top panel:
Tilt Up The Panel
carefully tilt the top panel up at the front being extremely careful not to rip, pull, pinch, etc... the wiring harnesses shown below.
These wires can be disconnected for top plate removal.