Oki ML1120 Technical Reference Manual page 15

3. Paper Guides: can be adjusted as required to locate the
left edge of cut sheet paper.
4. Pin Tractor: to load and feed continuous forms.
5. Rear Cover.
6. Serial connector: connect to serial interface cable.
7. USB connector: connect to USB interface cable.
8. Parallel connector: connect to parallel interface connector.
Technical Reference Guide – Introduction > 15
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