Epson TM-T20 Technical Reference Manual page 46

1
Turn off the printer.
2
Clean and dry the printer case where the buzzer unit will be installed.
3
With 2 included pieces of the affixing tape combined, peel off the
backing paper on one side, and stick the tape in the center of the
attaching surface of the buzzer unit.
4
Connect the cable of the buzzer unit to the drawer kick-out connector
on the printer.
5
Peel off the backing paper on the other side of the affixing tape, and
attach the buzzer unit to the printer case.
46
Affixing tape
Drawer kick-out
connector
Printer case