HP QMS 1660 - Manual (Page 179)

Optional
Network
Interfaces
6-41 Printer Options
4 Attach the NIC.
a Position the NIC so the port slides into the opening you just
created.
b Snap the plastic standoff onto the controller board.
c Snap the NIC onto the 80-pin connector and the plastic
standoff, both on the controller board.
It’s okay to push down gently with your thumb positioned on
the NIC right over the connector.
5 Secure the NIC to the printer with the screws you removed
earlier.
6 Replace the controller board and printer covers.
Use the instructions in the “Replacing the Printer and Controller
Board Covers” section of this chapter.
7 Reconnect all interface cables and the power cord, and then
turn on the printer.