The rail you will need to install with your 2 post rack is MCP-290-82804-0N (2-post rack rail set (no sliding) for 2U 17.2"W)
Installation guide:
1. Mount the inner bracket on the chassis side hooks and screw it.
2. Screw the system with inner bracket via oval holes on the front side of rack post.
3. Attach the outer bracket on the inner bracket with pins into the key holes.
4. Slide the outer bracket forward to screw on the rear side of rack post via oval holes.
5. Lock the sliding with the screw in the center.