HP Color LaserJet Enterprise flow M880 Multifunction Printer series - Manual (Page 153)

6. Lift the jam access cover for the output slot, and
gently remove any jammed paper.
7. Remove all paper from the top left door area.
8. Hole punch models only: Close the hole-punch
unit.
NOTE: Ensure the arrows on the hole punch are
positioned as shown in the graphic.
ENWW Clear jams 143