Epson Stylus Pro 7900 - Chapter 4: Printing With Epson Drivers for Windows

7900 and 9900 Field Repair Guide 10/6/10
Ink Bay Installation (Left) Printer Component, Software Item, LCD Display, Printer Button Page 123.
9. Install the Ink Tube Guide.
1. Squeeze in to release 2 Interlocks, and rotate the Ink Tube Guide into position.
2. Place the Ink Tubes under the Guides.