Asus RS926-E7/RS8 - Manual (Page 44)

Chapter 2: Hardware setup 2-22
3. Firmly pull the PSU out of the
system chassis.
2. Hold the PSU lever and press the
PSU latch.
To install a second PSU
1. Insert the PSU into the empty PSU
bay.
2. Hold the PSU lever and press the
PSU latch. Firmly insert the PSU
into the server chassis.