Setting Up the System 2-15PreparationThe following tool is required to install the cable retention arm assembly.Small Philips driverInstallation ProcedureThis document includes three cable arm installation procedures. They areInstallation Procedure A, Installation Procedure B, and Installation Procedure C.The procedure you use for installing the cable retention arm assembly variesdepending on the depth of your system rack. Also, some of the hardware useddiffers depending on the procedure you use.Use the table below to determine the correct installation procedure you shoulduse.Distance between themounting surface ofthe front and rearvertical railsInstallation procedureyou should use700mm ~ 774mm(27.6in ~ 30.5in)Procedure A775mm ~ 829mm(30.5in ~ 32.6in)Procedure B830mm ~ 900mm(32.6in ~ 35.4in)Procedure CIf you are unsure of the depth of your system rack, refer to the illustration belowand measure the distance between the inside surface of the front and rearvertical mounting rails of your system rack. See Figure 2-13.Figure 2-13. Measuring the Rack