Hitachi CB 520H B3 - Backing up the LPAR manager configuration as of a time before device isolation

2. While unlocking the adapter stopper, push in the GPU adapter into the
card adapter F/H.
3. Slide in the optional power cable connector into the PCI blade card
adapter F/H, and then push in the connector into the GPGPU.
4. While holding the two portions marked with white circle, align the
connector guide hole of the adapter F/H with the guide pin on the main
board, and then press the portion marked PRESS HERE.
5. Push in the PCI blade optional power cable connector into the main board.
Replacing parts
5-83
Hitachi Compute Blade 500 Series System Service Manual