GE MAC 5 A4 Operator's Manual page 26

Equipment Setup
3. Attach the cable clamp to the external barcode reader cable approximately 100
mm from the ferrite.
4. Use the M3x10 screw and cable clamp provided along with the external barcode
reader kit, to assemble the external barcode reader cable to the Display rear
cover.
5. Connect the barcode reader cable connector into the USB slot of the device.
26 MAC ™ 5 A4/MAC ™ 5 A5/MAC ™ 5 Lite 5864335-001-1