Canon imageRUNNER ADVANCE C3330 Series Service Manual page 1116

23. Install the Card Reader, and store the cable as shown in the figure.
NOTE:
Store the cable in place so that the Transparent Cover is securely fitted in step 28.
24. Remove the release sheet of the DP Fireproof Sheet, and affix the sheet by aligning it the 3 ribs and pushing it
against the Rib [A].
25. Place the cushions over the DP Fireproof Sheet.
NOTE:
Be sure to adjust the number of cushions (1 or 2) according to how the cable of the Card Reader is stored.
1x
Rib
1104
9. Installation
Rib[A]