This article provides more information about Elo P/N: E553538: ELO-20-Inch Rack Mount Bracket Bezel Kit for 2094L

Elo P/N: E553538 is a rack mount bracket for the 2094L Open Frame Monitors equipped with IntelliTouch, AccuTouch, and SecureTouch technologies. This bracket is NOT for the PCAP version of the 2094L monitor. This bracket allows you to mount the 2094L in portrait mode into a standard 19-inch rack (U11). 

Drawing of E553538 Rack Mount Bracket with 2094L monitor.