Epson TM-T88 Series Technical Reference Manual page 30

4
Remove any of the knockouts (at 3 locations) on the rear cover and pass the cable through.
5
Close the rear cover.
6
Connect the AC cable to the AC adapter.
7
Connect the AC cable to the power outlet.
30
Before disconnecting the DC cable of the AC adapter from the printer, make sure that the
AC cable is disconnected. Then, hold the arrow part of the connector and pull out the
cable while keeping it straight.
Arrow part of connector