10.3.2 Top Exit cabling feature (optional) Figure 10-5 Top Exit cabling feature  The optional Top Exit cabling feature (FC 79176) allows for I/O cabling and line cords to exit  the top of the frame. This feature adds cable management options, such as trunking and  retainer brackets, as shown in Figure 10-5. The Top Exit cabling feature can be placed as  shown in Figure 10-5, with the exit area towards the front of the frame, or with the exit area  towards the rear of the frame. The Top Exit cabling feature adds 117.5 mm (4.63 in.) to the height of the frame and  approximately 5.4 kg (12 lbs) to the weight. If the Top Exit cabling feature is not ordered, two sliding plates are available on the top of the  frame (one on each side of the rear of the frame) that can be partially opened. By opening  these plates, I/O cabling and line cords can exit the frame, as shown in Figure 10-6. Figure 10-6 Sliding panels (no Top Exit cabling feature) 350  IBM 14 Model ZR1 Technical Guide