Epson 5350 EN - Manual (Page 49)

Connecting to a Computer 41
4. To use the ELP Link IV software or to program new effects for the
Effects buttons on the remote control, connect one end of the Mac
serial cable to the Mac SERIAL terminal on the large end of the
main cable.
5. Connect the other end of the Mac serial cable to the printer or
modem port on the back of your Macintosh.