Connectors are the same for 4220 and 4320 projectors.
Safety Instructions as described on page 8.
Installing the Optional Wireless Dongle
Your projector must be installed with a wireless dongle if you want to use the
wireless networking option. Refer to "Wireless Networking Installation" on
page 57. The wireless dongle is not shipped with your 4220/4320 projector.
You can purchase it on the Dell website at www.dell.com.
Unscrew and take off the wireless cover.
Plug in the wireless dongle.
Assemble the wireless cover.
Before you begin any of the procedures in this section, follow the
Connecting Your Projector