EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Disassembly & Assembly Disassembly Procedures 247
4. Insert the tab of the "Joint Plate" to the slit of the "Base, Left".
5. Insert the "Base, Left" with the "Joint Plate" set in the Step 4 under the left 
bottom of the main unit until the notches hit the rubber feet of the printer.
Figure 4-54. "Joint Plate" Attachment
Figure 4-55. "Base, Left" Setting