Avery Dennison Monarch 9855 Operator's Handbook, Maintenance, Service & Parts Manual page 20

For fan-fold supplies, lay the label strip over the supply holder and
across the supply guide so that a few inches extend past the front of
the printer. Tuck the supply under the nibs and in between the die
cut sensor.
Suppl y Roller
Suppl y Roller
2-4 Operator's Handbook