To connect the cable to one of the USB ports on the iMac keyboard, hold the cable’s USB connector so the 
icon faces away from you and connect it to the USB port.
USB port 
OR | optional USB hub |
USB cable
If you’re using a USB hub, plug it into a USB port on the iMac keyboard, then connect the cable to an available port on the hub. If you have more than one hub, connect the cable to the first hub.
3. Connect the other end of the USB cable to your printer’s USB connector.
4.Continue with the next section to install the USB Printer Device software and EPSON Stylus COLOR 740 printer driver software.
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