Epson TM-T82II Technical Reference Handbook page 46

Connecting the USB interface cable
1
Insert the USB cable into the USB interface connector of the printer.
2
Put the USB cable through the locking wire saddle.
Putting the USB cable through the locking wire saddle, as shown in the figure below,
prevents the cable from coming unplugged.
3
Connect the other end of the USB cable to the host computer.
46
Locking wire saddle