Lenovo ThinkSystem DM Series NVMe 2U24 SIR rail kitinstallation instructionsThis guide describes how to use SM17A56607 to install a DM NVMe 2U 24-drive chassis in a four-post rackfor ship-in-rack enablement purpose.Before you beginBefore you begin the installation, check the parts contained in SM17A56607.SM17A56607: Ship-In-Rack Rail kit ASM (1 pcs), which contains the following in the package:Lenovo PN Vendor PN Description QuantitySM17A56611 400-01267 Left Rail 1SM17A56612 400-01268 Right Rail 1SM17A56613340-12807 Flange screw with Loctite, M5x16 4340-12808 φ6 washer, 2 mm thick 2340-12876 Flat head screw, M5x6 mm 2SP47A30387 SIR rail kit installation instructions 1ProcedureStep 1. Take out the parts from SM17A56607, and then adjust and install the left rail (SM17A56611) on theleft rack posts.Repeat for the right rail (SM17A56612).Note:This type of rail kit has a toolless design, so no screws need to be assembled for now.Figure 1. Installing the rails11